Insecurities

I (17M) have been in a super depressed state because of the way i look, i went from obese to now pretty decent muscular build, however, i cant seem to shake my insecurities about my body and my looks, i am super duper insecure about my breasts, i constantly tighten my belts to make it seem like i have a smaller waist, suck in my stomach, pull my shirt over my chin and so on and so forth. Yesterday i felt like i was finally good looking and i took a shot with a girl, but it backfired and she called me ugly and blocked me, am i really that ugly? I dont think i am tbh im definitely not handsome but i dont think im ugly, and it hurts man. I cant think of my body or face positively even tho everyone compliments my physique and a few woman showed interest in my looks, but i dont understand why the more im improving the less fortunate i am with women and the more im insecure. I had a talking stage with a woman and it was going great then out of nowhere she ghosted me, and im in really deep pain because of it and partly because my bestfriend is dating the woman i had a crush on since i was 15, i saved myself for her, lost the weight for her, and just when i thought i could finally gather up the courage, my bestfriend says they are talking fully knowing i have had feelings for her for a while, thing i dont understand is, my friends always rank me above him, physically and facially. So why him? Why am i so insecure? Why cant i get a woman in my life? Im not asking for much am i? Im not tryna make this a sob story but im genuinely devastated from this. I worked my butt off to get where i am, im super nice, i pray i do everything i can to help others, yet no one is there for me. Is it because im not good-looking enough?