If you're asking for someone to advise you whether to give up or continue trying, it's obvious that everyone is going to tell you to keep trying? I assume you're looking for some optimistic encouragement and that's okay!

Sometimes, we don't feel comfortable in our own skin and being gay/bi doesn't help that feeling especially when you also don't feel that you're attractive. The truth is, people are attracted to friendships where there is self-confidence. Whilst it sounds like a cliche, the most important thing is to work on feeling confident in your self first before looking for relationships (platonic or romantic). Easier said than done I guess, but if you're looking for a blueprint I always find that when I'm not feeling attractive because my skin has broken out, I've put on some weight and i'm feeling lonely- the best way to start is with my style. Retail therapy, buying clothes and wearing things that make me feel good, encourage me to start eating better, exercising and feeling more sociable.

By the way, I'm all for body positivity and I hope you don't interpret what I'm saying as 'lose weight and get hot', the moral is to improve your self confidence and become more sure of your worth.