Hi there, this is the first time I've posted here so not sure really where to start. I'll start with the story and then go on from there. I could really do with some advice and opinions as it's not straight forward to me.
Basically, in March I started going out with my best friend of about five years. It was going great although because she was on a gap year and I was at university, it was sometimes long distance. But it worked well for us and the relationship was going great. Then I made a mistake. I'd always known she didn't like heavy drinking and that she didn't like people getting drunk. So I cut back my drinking a lot but didn't say anything so she didn't feel like she was making me do it. However a few months into our relationship, I had gone out with some friends at the end of term, got very drunk and ended up throwing up - not a proud moment. Anyway, I knew she wouldn't like it so I didn't say anything as I thought it would make things easier. When she asked me if I had been drunk, I just said that I hadn't been and promised myself not to get drunk again. A couple of days later, someone posted something on my facebook about how I'd thrown up. She texted me and asked me to phone her so I did and she asked me to be honest and tell her if I'd been drunk and thrown up. I panicked and lied and she said she would check with my friend. I phoned back within a minute or two and came clean and admitted I had been drunk and that I had lied because I panicked. I apologised profusely but she said that her trust in me had been broken and that we would have to go back to being friends. I tried to persuade her to just give me a second chance or at least give me until the end of summer to try and regain her trust but she said that if I wanted a relationship to work with her, we couldn't keep it going until she'd regained her trust in me.
I was coming home two days later and I went round to her house and tried one more time to talk her round and explained how I had stopped drinking so she wouldn't have to worry. The trouble is, I'd broken her trust and because of insecurities about trust that have come up from past boyfriends repeatedly breaking her trust, she wouldn't be able to get rid of the fear that if I could lie about drinking then I could lie about cheating on her. She suggested we didn't break up completely but went on a break and considered coming back to things after she'd had a chance to settle into university and regain her trust. I agreed and got on with our friendship. A couple of days later I saw her and she asked me if there was anything else that she should know if we were to get back together in the future. I admitted that the day before she broke up with me, I had been naked in a hot tub with my other two close friends (who are going out) and she was understandably angry. She suggested going back to just being friends permanently but I persuaded her not to do that on the basis that I had made a mistake and that I had admitted it to her because she asked me to open up about everything. Everything was resolved and we went back to being friends on a break. It was going great - we were still really close, she was still being extremely affectionate and she was appreciating my trying to rebuild her trust.
However then things started to go a bit wrong. I started acting very insecure and we argued occasionally. I've just been diagnosed with depression (I've got a very ill family member and that, plus the situation with my best friend hasn't helped) which in hindsight, I think caused me to be insecure. I was telling her about how I had got a little bit of a hard time from some friends about my not drinking and she kept getting worried that she was forcing me to do things that were then causing me to have issues with friends and family. I tried to convince her this wasn't the case, but she couldn't be certain.
We then went to a concert in London and she was acting different - more distant and less affectionate. I was feeling really insecure about this and then on the train back, she asked what was wrong and I told her. She ended up admitting that she was struggling with stress about her nan (who is VERY ill [terminally] at the moment) and that she didn't feel like she had to act like she was fine around me. I apologised and comforted her (she hardly ever opens up so this was a rare event for her).
We continued getting on fine but then about a week and half later, I went round to see her and she eventually turned round and said she felt that we had to go back to being just friends and that she couldn't see us ever being more than friends. Her reasons were that she we had been arguing more and she felt that this was being caused by the possibility of a relationship hanging around. Another reason was that she didn't think we were compatible as a couple. When I asked her in what sense, she struggled to give me a real answer - the nearest to a real reason she could find was that our sense of humour is different. Her other reason is that she's going to university at Oxford and that she would probably be moving there after and therefore it wouldn't be practical. She was crying her eyes out while telling me all this and it was clearly hard for her to hurt me. And I'm pretty sure these weren't the real reasons for ending things completely. I tried to change her mind the next day but she started saying that if I kept doing that, it would harm the friendship. I relented and haven't said anything since but I'm certain there's something else going on. There's definitely no one else, she takes years to become close enough to someone to go out with them so it isn't anything like that but I can't work out what else it could be.
There are several things that might be useful to know. As I mentioned earlier, her nan is very ill and she's very upset about it but doesn't really talk about it. She's also starting at Oxford University in October and she has been worried about Freshers week as she thought that everyone would be going clubbing although I've managed to relax her about that. She's been meeting people that are going to be on her course to get to know people which has helped people too. She is still a bit nervous about leaving home though as she's close to her family.
I'm just wondering what people think as to why she has done what she did and also if anyone had an idea how I might be able to work towards getting back together with her. I'm aware there are probably no short-term fixes but I'd like to think that after she's spent a bit of time at university, she might settle down and then be able to have a relationship with me again. We are very similar in what we look for and I think we work really well together in a relationship. But until she believes this, nothing's going to happen.
Any advice/help would be really appreciated