<human>: I know that sounds really lame and pathetic, but the truth is - he was the biggest part of my life for the past year and a half. Everyday we would talk, and every few days we'd see each other. Before he left me, he said that he was still in love with me, but he wanted to basically sleep with other girls. (Fuck that hurt) Overall, we had a wonderful relationship and this honestly came out of no where. Just on Saturday, I went over and for the first time since April, we got "alone time", where it was just me and him in the house, (his aunt was living with him and his mom, so she was ALWAYS there) no one else and honestly? We had the best sex we've ever had, had a great night, and just had fun and got to bond. And then two days later BAMN he's wanting out.

I guess what i'm trying to ask is how the hell do I get over this, he was my first relationship, and the first guy I fell in love with. I did have the chance to walk away from him 2 weeks ago, he was hitting on and sexually flirting with another girl, but he lead me on from that point and kept saying he wouldn't act on it, he doesn't want me to leave him and he loves me...and again, now this.

Summarize the given text in a few sentences.
<bot>: boyfriend of a year and a half just left because he wants to fuck other girls, not sure what to do with myself or how to handle this.