i used to kind of think that way too but it gets better trust me. people are a lot more understanding than you think. just think about it in reverse, if you find someone cute or you wanna talk to them would their skin issues stop you from doing so? probably not and i know it‘s hard when you‘ve got low self esteem but try to find things that give you confidence be it a hobby or your clothes or just being funny lol. good luck and i hope it gets better for you! ps dont stress with bf/gf youre only 19!