Advice needed please :(

Hi everyone, I'm new and apologies for getting straight to it, but I'm at a complete loss at the moment. I will explain a bit about my boyfriend (L) before getting to the real issue, so please bear with me as it may be a long post.



L is 32 and I am 25, we met through working with each other which we no longer do - he is still at old place. We have been together 18 months, but known each other for 3 1/2 years. Currently living together and have been for 6 - 7 months.



L is a huge football fan, to the point of attending every home game of his team, ALL away games across the country, and also European away games, he also goes to the gym 3 times a week and plays football one night a week. Before we were together he never really had a serious girlfriend and used to spend a lot of his time online chatting to women, exchanging numbers/ pictures, going on dates and sleeping with them.



This last couple of a weeks a few things have come to light in the relationship which have left me confused and unsure about our future, I know I want to be with him and that I love him unconditionally but I have little to no trust at the moment and don't know how I can change that.



1. When we first started seeing each other he received a few messages from girls on his phone which I brushed off as he said they were mates, turns out his definitely of mates was that he used to sleep with them - he has only told me this this week.



2. He has also only just told me this week that he did not have an STI test before getting with me over 18 months ago...after sleeping with 10 - 20 people, some unprotected. I have registered at the local drs so I can get a test done asap. As much as I am annoyed with him I have to take responsibility in that I did not ask the question before sleeping with him.



3. He was looking into maybe booking some Euro away trips with his mates when a certain location came up in conversation on Twitter, as I follow his friends also I had full view. When I asked him about why everyone was so keen to go to this one place he said it was because of a strip club/ brothel. He has already been to this place last year as part of a Euro away trip, before he even went I told him that I would prefer him not to go there as I don't really approve of the idea of them places, before confronting him about what I saw I even looked back through our message history when he was away at that place last night and I asked him to let me know if he went there, and it was there in black and white in his reply "No need to worry, I have gone back to the hotel by myself..."...so he lied to me.



He is now away until the end of the week, which is how the next two issues have arisen.



4. My phone is broken, so L gave me his old phone to use so we can keep in touch, when he gave it to me it still have pics that previous girls had sent him and also their msgs and contact details...so now I can't help but think of what he used that phone for.



5. As he is away for a week we were looking on his phone last night to see if he could download Skype or something similar for us to call each other, which is when he logged onto his internet, immediately a porn site came up and I obviously asked him why that it was there...to which he said he had be looking at it 20 mins earlier WHILST I WAS IN THE BATH.



I'm at a complete loss as to what I should do, I have no issues with him and his football commitments and even got in the bath last night to get out of his way when he got back from the match because his team lost...I realise writing all this down it is a lot, and it highlights a lot of trust issues.



I guess I was just hoping for someone to either reassure me that as the issues were in the past then they shouldn't be as big of an issue now. Any advice would be really appreciated as I have a whole week of going stir crazy trying to decide what is best.