<human>: Could you distill the essence of the text into 1-3 sentences?

Two years ago, my boyfriend and I got together a week after he was dumped his ex-girlfriend of four years. It's rumored by a lot of people that they were falling out of love a year before they broke off the relationship and had been on a "free pass" for quite some time so I wasn't all that suspicious when he asked me out. We had been friends for quite some time and when he asked me out I was beyond ecstatic and everything was perfect. He told me repeatedly that she treated him like shit and he was so grateful I was in his life and made him feel loved again after so long. I ended up losing my virginity to him a month later and he told me that sex had never felt so good and I made him love life again. I became really attached to him. I introduced him to my friend group and they all liked him too and made him feel included. In our relationship time I helped motivate him to go to college, got him a nice job at my father's work, taken him on nice vacations and have showed him with love. Everything was going great until last month. When my boyfriend and his ex broke up he lost his whole original friend group because they all choose to be with her. He was invited to a pool party with his old friends and his ex last month for the first time in a long time  and has been hanging out with them non stop this past month like old times. I was invited to go out with them to another pool party a couple days ago and the whole time my boyfriends ex was rubbing up on him in her bikini and he seemed to respond flirty back. I was really upset about this. When I asked him about it he confronted me that he has contantly been having dreams about having sex with her and that he misses her after years of him telling me that she ruined his life. He says he still loves me and I'm his number one but he has been talking to me about how she still holds a special place in his heart and he will always love her. I don't know what to do or how to handle this. I need advice.
<bot>: Boyfriend of two years has been hanging out with his ex this month and recently admitted to be that he still has feelings for her after years of telling me how much she ruined things for him.