Romantic betrayal. Would love some words of wisdom.

A year ago, I (32F) have started a LDR with a guy (33M) who have just broken up with his longterm GF. They still lived together as the break up was very recent, but since it was long distance between me and the guy and as it has started out as a summer fling, I didn’t took it so seriously and just went with the flow, as per usual in these situations the chemistry was crazy and the sex was the best one of my life. Obviously I knew that there was a high chance me being a rebound for him, but being inexperienced and a little naiv and also pretty infatuated I wanted to see if things might be heading into something beautiful. Fastforward 8 months, daily contact and monthly visits, we break up. In the last two months, things took a weird turn, as suddenly now that his ex is out of the appartement that he kept, he starts missing her. Instead of telling me this and breaking up with me, starts two months were he leads me on. In these two months he starts to neg me (once I was joking with him about him possibly judging me for a small thing, for which he proceeds to tell me jokingly « oh, I already judge you for so many things » and then kisses me), comes to see me one last time telling me later that at that point he already knew he wanted to break up, but instead of telling me he of course just has sex with me all night long, he then drags on the relationshit during one month, let’s me send him a birthday gift, then engages with me sexually by sending me videos jerking himself off to my pictures, and then right away ghosts me when I confront him about the fact that I also have sexual desire for him but would like to see him IRL at one point (he hasn’t proposed to see me since 3-4 weeks at that point), then when I would propose him a phone call about it he would ghost me and send me a break up text 2 days after telling me that he is very sorry but although he likes me very much he doesn’t have feelings for me and now since he started to see his ex again at their common sports training, he feels different (although according to him nothing has happened between them). FYI, after 6 months were I have initiated to define the relationship discussion since he started pulling away, I have asked him why did they break up after almost 7 years he tells me that he had lost attraction for her as she put on 15kgs and « since she is small it’s definitely showing, and she eats a lot », and that they have basically lived as roommates since 2 and a half years. During our final break up phone call, I told him my two cents about the fact that he should be alone and grieve their relationship with the ex instead of running back to her « because he feels lonely in his appartment », but have accepted, and thanked him for the moments we shared. He didn’t thank anything nor presented excuses for leading me on for this many months, but proceeded to tell me that at least the sex with me was pretty awesome, and that he never got laid so much than with me.

I have nevet felt so idiotic, so used and so disrespected, and heartbroken cause I have also really liked the guy.

I am grateful to know now that emotional immaturity will be a total dealbreaker in the future, and I am hopeful that this guy was just the ultimate mega-boss in the jerks department. 6 months after the break up I start to feel normal again and have integrated all the lessons in order to seek a more fulfilling relationship. I have even started to forgive him in my mind which is huge! I am proud to have been in no contact with him ever since.