Rough weekend need some insight

Hi everyone

Just gonna give you some background info. Me and my gf have been going out for almost 4 months now. She is 19 and i am 20. Everything has been going great we've had some moments of doubt (her ex trying to split us up) but just last weekend we had a pretty rough period. She had been on holiday with one of her close friends and i had been away with work training. Just as i got home see sent me a text explaining she wanted some space to sort her self out (she suffers from depression) etc and she wasnt doing this to get with any guys or she wasnt interested in anyone else and wanted to be with me and spend time with her friends. Ofc i was totally understanding and said that was fine although it did upset me abit. i asked to see her that day to just explain a little more. When i seen her she was so happy to seee me everything was fine. So i left that day having made plans to go see a friend for the evening. During my evening my neighbourgh rang me asking me if i was still with her because she and some guy where all over each other. i said yes my neighbough confronted this person which actually turned out to be my girlfriend and in the end of it she appeared to be cheating and flat out wasted (we had spoke in the past about how being drunk was never a excuse). The guy she was with turned out to be someone i actually know as a dick head in town for being attention seeking etc. I tried to ring her throughout the night and got no answer. I managed to get the guy on the phone and he said she had said we had split i ended up just going back to my mates in quite a state and sleeping. The following day she text me saying she wanted to see me alot of people had been stiring. I waited at her for ages before she let me in. She said she had taken this guy with her just for company since she was home alone that week and at the time wasnt in t,he mood to speak to me so was cleaning. i belive this to be true because i was talkng to the guy on face book i told him to tell her i love her(i later found out she saw this message and had to turn away because she had teared up). When we eventually sat down to talk i just simply explained to her my side of the night and she explained hers. She said just after i left she had a mini break down and left to go to her friends explained to her mates that we were on a break (which she belives they miss undestood) where she had drank JD shots a drink i know she hates the guys off (because i love it and she refuses to kiss me when ive had it ) and got absolutely done in and smoked 2 fags which i know she hates also then this guy had started to cry for some reason and she went to console him when he tried to kiss her serveral times just as which my neighbor began to get all in her face and follow her around which upset her and lead her to leave. I then asked her how this guy got to her house earlier she said he walked i said are you sure i saw him as you both pulled up in her car. Her face dropped and she started to sob abit. i told her aload of stuff about lying and then said i forgive her. we then had abit of a heart to heart, called off the break,and stayed together for the rest of the night had some Chinese food and went bed and did ya know the deed ;) the next morning she gets up and goes to work i pick her up after she asks if she can walk because she feels really angry and doesnt know why (i account this to her depression as she has moods where shes just so snappy with me then feels so bad after ) we get back to hers and i help her pack up to move into her uni house (she goes a university 20 min drive away) with her mates. she leaves to go there everything seems fine. im due to go to work next week away again for training technically giving her the space she needed anyway. The next day she seems really distant ( im use to this when shes with her mates anyway because she doesnt really touch her phone at all when shes with me or her friends) i play it off as that and she texts me loads in the evening . Im ill at the moment and havent gone to work so im really wanting to see her. So the days pass the same till Wednesday when she randomly appears at my house to see me. i was very happy as you can imagine we arrange to meet the next day today (at no given time) she texts me saying she doesn't want to go to the city like we had planned but wants to just go somewhere else because she needs a cuddle. thats where im at now ...

can someone please give me a idea about what you think has happened or happening are we on our way out or is this just how its gonna be while she adjusts back into uni