OP, once you go into higher education and go to a couple of parties or join some clubs your life will change in terms of platonic relationships and dating.
From there you'll find love if that's what you want. As for people judging you and blaming you. I get that all the time. Only by accepting there's nothing I can do about it has helped me get over the most part.
It has helped me become happier with my situation. You can change your weight yes, but you can't stop people judging your appearance or blaming you for things. So focus on what you can change, and if you feel it's worth changing then do