another rebound, just wanted some female support

I was talking to this guy from tinder a little over a month and we planned so many things from sex, cuddles, our future, etc he would call me baby, tell me how much he likes me and hopes i don’t leave. He would get anxious and overthink but I’d always be there to reassure him that i won’t leave. He told me I was different cause I made him comfortable to where he could talk about his trauma. He talked about me to his Co workers and friends. He stopped talking to me yesterday and all day today cause turns out he was talking to his ex the entire time. Should’ve known since they just broke up like a few months ago. He called me for an explanation and basically just kept saying idk and that I was a rebound that he used and feels bad for. Everything I overthought was true. His ex was spending the weekend with him and was hanging out with him while on the phone with me. Turns out they were gonna get back together and he didn’t know that she would be 100% into it but she is so now they are trying again cause he loves her. Anyway I wish I had more of an explanation but there’s no point, I’m always being used and am the rebound. How will I ever trust anyone and get someone to love me. All I can think about is them laughing, cuddling, and fucking all weekend. He says he loves her and knows her for years but that doesn’t make it better. When will I be the girl someone had known for years? When will I be the first choice? I know I could do better but I feel so powerless since it was so easy for him to drop me and delete everything. Hated me so much that he lied about deleting snapchat just to unfollow me and get rid of my pics and nudes. Gave me up completely for her. He says he feels bad but I feel like they are actually just making fun of me at this point. Why couldn’t he leave me alone, he doesn’t care about me. How will i find someone that prefers my features? I jeep reliving it all over again thinking of new things, and I wish I could shut it off. Sorry for the long rant.

another rebound, just wanted some female support