I'm in a situation at uni. There is a boy in my halls and we had sex a couple of times before christmas. We were talking over christmas and sexting and stuff, I found out he has a situationship at home and he also has a really complicated "casual" thing with a girl in his friendship group. Since I got back we've been seeing each other and sleeping together quite a lot. I don't have romantic feelings for him but it has really been getting to me. A few weeks ago I had slept in his room and was there in the morning for a few hours, but then the other girl knocked on his door and they went outside to chat - he came back in and said he was sorry but he's off to smoke with her and could I wait a bit then sneak out so she doesn't see. I told him we should just be friends after that but that didn't last long. I genuinely don't want to date him or anything but I feel really guilty about this girl, because I think that's been going on for months. I struggle with ending it because uni makes me insanely lonely sometimes so I sort of take whatever connection I can get - also we all live together so I can't really avoid him. Apparently both of them get with other people and they know it's not exclusive but I can sort of tell she likes him and he seems to be ignoring that. I know the obvious answer is stop having sex with him, and I know I need to but I just want to hear other peoples thoughts on this because I feel really guilty