My boyfriend has been so hot and cold for the past few months, he would never say sorry for upsetting me, constantly dump me and come back etc.
a few months ago his friend who was obsessed with him stayed round as apparently she was drunk and fell asleep. he got in bed with her but soon realised it was wrong so left to go to the other room, but in the morning came back and cuddled her. he told me about it and said he played with her boobs too. he said it was all to piss me off.. i went through his phone and turns out they stayed in bed that morning snd then went out for lunch with their mutual friend. i got over that and left it behind, he promised not to speak to her again unless he can't avoid it.
today i found some underwear behind his radiator that doesn't belong to me. i asked if it was that girls. he kicked off and told me maybe but he doesn't know as he didn't see her naked and that it shouldn't matter if it is or isn't hers. i asked him to ask her if it did belong to her but he refused and said it was too much drama. i asked her myself and she denied it- but he rejected her so why would she admit it after he made her look stupid before. he said if I'm gonna be annoyed i can leave his house.
i left crying, he texted me only to say that if he cheated why wouldn't he tell me when we fell out. but it seems very strange. i don't know what to believe. he says i should trust him, but how can i believe nothing happened?