I wish I didn't met him

last year I met a guy and we started going out and we talked every day and maybe in a month he started flirting with me, I did the same and something began there we start with kisses like making out and then I find out that he had a gf but he broke up with her and we continue with our making out sessions...after maybe 6months of talking and making out we started having sex but like in a fwb thing, and that's what we've been doing for a year now... but the thing is that he's not sweet and kind like he was, now he treats me like shit, he doesn't care about me last time I told him that it was over and the next day he send me a message if that night I wanted sex...like he keeps reaching out for me and I don't know if he feels something for me (I've already asked him and he said no) but I'm so over this....