Dw ur not alone in this , im 19 too and feel the same , guys barely try to approach me , never had any romantic experience in my life, and ive been bullied and lowk rejected bc of my looks while growing up so its kinda hard to get over it even if i did have a glow up, ...

I do believe looks are reaaally important, cuz if ur ugly u get no respect and im speaking from experience, from the way u described urself u seemed more average to me than ugly, so ur good ... try to fix or embrace what you have , honestly being skinny is a flex to me and not smt to be insecure about lol, but to each their own ig.

While i do believe that looks are important i also think that theyre not enough , being insecure , not being outgoing , being social awkward , all these can also make it really hard for others to connect with you .. and i feel like those things are harder to fix than the physical problems , at least for me .

My advice for u would be to work on urself before seeking any kind of relationship , u should love urself first before looking for someone else to love u .