Should I just give up on dating since guys seem to leave me for fit, slim or gorgeous women?

My boyfriend of seven months cheated on me with a slender woman. I caught them making out at the park by our college! I dumped his ass immediately. He said, “Well what did you expect? I like a woman than can take care of her health, not a 200s woman.”
Wow….

Now look, I was never one to turn head at all and I was never the prettiest woman. I won’t sugarcoat it. I am not gorgeous. Im just average. I am a big girl, plus size and 234lbs. Size 16W/18W.
I am currently losing weight. I lost weight before (went from 250lbs to 190lbs) but I gained it back after my high school boyfriend left me for a model. Then I had a another boyfriend that I dumped because I caught him in bed with another girl. A petite, thin girl and she is beautiful
I never gotten a third date.
My dad made sure I feel beautiful the way I am.
I was never called gorgeous or drop dead gorgeous, not even my own father or uncles. Or my mom. Some of my cousins are gorgeous.
My dad said, “If you think she’s pretty, her cousin (her name) is drop dead gorgeous. Beautiful girl my brother and sister in law raised, also takes care of her health, works and very polite.”
It made me feel horrible but I mean it’s true I’m not gorgeous. I’ll never be gorgeous and I just have to accept it. My mother is a gorgeous woman. Why am I so ugly?
One of my cousins jokes and said, “Because you look like your dad. That’s a problem. No wonder you’re so ugly.”
Wow that was mean. He was like, “Oh come on! That was a joke.”

Updates
1 y
Oh and I’m 5’7
Should I just give up on dating since guys seem to leave me for fit, slim or gorgeous women?
Post Opinion