My partner just told me he is bi

Hi. I've asked this question in the relationships thread and I've gotten a few responses and some answered my questions. However, I still have some questions left so I guess I'll just ask here.<br><br>I've been with my partner for 3 years (he is 25 and I am 20 both male) and he just recently embraced his bisexuality. He's told me that this is a brand new thing for him, that he only recently found out that he is bi and he's been in relationships with both men and women before he met me and never felt any attraction towards guys.<br><br>However, a few months ago, he told me that he is bisexual and I was so confused. There were red flags, like him suddenly joking about confronting the cashier that was flirting with him a few days before he told me he is bi. Also, a few days after, he told me that he is lonely because I'm leaving for college and that he is going to get a job which is good because he will be busy so he wouldn't feel lonely but he told me that he is scared he would start hooking up with other people when I am not around. I told him that what he is telling me is like cheating and that I don't trust him now.<br><br>He told me that if he ever cheated on me I should leave him and that he will do everything to earn my trust back. I told him that I will give him a chance to mend our relationship but that will take time and he told me he understands. However, I recently found out that he would watch gay porn and that he is attracted to men. I don't know how to feel about it. I feel betrayed and hurt by what he told me and I feel like he wouldn't be honest with me again.<br><br>Now, I don't trust him when he is alone. I have been feeling unappreciated and unwanted. I feel like I am not enough for him and that he only sees me as a rebound whenever he isn't in the mood for men. I don't know if I should end the relationship or not. I don't trust him and even if I do, I am not sure if I am ready for an open relationship or if I am okay with the idea of him being with another man. Please help me. I don't know what to do.<br><br>By the way, I am gay and I don't really have any problem with the fact that he is bi or that he is attracted to men. I just feel like he isn't telling me the truth about this and I am not okay with the idea of him having sex with men behind my back.<br><br>**tl;dr: My partner just told me he is bi.**