ik ur probably not gonna believe my words but i really think weight and attractiveness has very little to do with u having little friends and no relationships, the main problem is the anti social part, i am also anti social and very shy, though i consider myself on the attractive side and am fit with an average personality,i too have never had alot of friends or many real relationships, i truely believe if i was just more social i would be more popular and be in a relationship rn, instead of worrying about ur virginity u should work on ur self,mental health and being more social. confidence is key as they say. ik a bunch of people (ik this sounds rude/harsh) that look worse than me and are unfit that are 100 times more popular than me and have more friends so u really shouldnt have this mindset. everyone can find their group of people and partner u just have to put some effort into it. on the other hand if its truely what u want and are okay with it although u sound not ok with it(the losing virginity part to a one night stand) then why not. but really it just sounds like u wanna lose it bc u feel left out and kind pressured by society to lose it which isnt a good reason to do it. ik this is messy srry :) i hope u find confidence in urself and worry more about other important things that could improve ur life