I am a beautiful woman, I can become a model if I want (just to describe my looks,) This guy I liked and shared my first kiss with at 22, hates me. He hated me from te start, he would undermine me and judge and only wanted sex, now he has a girlfriend and she is average pretty but from what I can see he treats her like gold. I didn't treat him bad, he just hated me.
The first sentence you wrote makes me think its because you're vain maybe he saw that from the start and is why he is now happily dating somebody you consider to be average looking. It's just my opinion after all I dont know either of you.