Okay.... so my boyfriend was caught several months ago texting a female co-worker of his. I had asked him before not to have contact with her outside of work unless it was work related. The text I found were not work related and did invlove "friendly" content that some could consider flirting. I went to him with how I was upset that he assured me he would not text her unless it was related to work stuff but he did anyways. He apologized, assured me it was innocent an promised it wouldn't happen again. Well, a few months later it DID happen again. But this time before I addressed him about it he deleted the messages from his phone. So again, I was upset and I went to him very upset about how he promised not to have convo's with her outside of work and I was upset he broke his promise and how I was even more upset that he tried to cover his tracks by deleting the messages so I wouldn't know. Well, he apologized, assured me it wouldn't happen again, and PROMISED he'd never talk to her outside of work unless it was about work and he promised he'd NEVER delete text again. Well, a month later guess what happened? Yes, he had convos with her again and DELETED them out of his phone before he thought I saw them. So, I was livid. I went to him very upset and with all trust completely broken. He claimed he did it because he was afraid I'd see text between him and her and I'd get upset. He then claimed I was ridiculous for not allowing him and his co-worker to talk outside of work and that I was controlling. I stated that I was more upset about the fact that he kept breaking his promises than over anything else.
Anyways.... now, there is a surprise birthday party coming up next weekend for his co-worker Adam who he's recently become closer friends with. Of course, his female Co-worker will be there. I told him that I was uncomfortable with him going to the party. He basically said "too bad, you're being controlling, it's my friend's party, I don't care about her, I'm going whether you like it or not." I told him that he's damaged our relationship and it would gain my trust if he showed he cared about my feelings over going to some party where he's sees these people everyday at work anyways. Well, he's dead set on going to the party and saying I'm be controlling and I need to "get over" what he did.
ADVICE?