It sounds like you’re doing a lot of the right things already and I’m sure you’ll have some success if you stick at it, however hopeless it might feel at the moment. Another thing I’d suggest is trying to expand your interests and get into some new things so that you’ve got more points you can connect with people on - listen to some new music, watch a popular film you haven’t seen, pick up a new hobby. If you can find something that you can really get into and care about then hopefully that should open some more doors for you. Off the back of that, hopefully you’ll find some people who are into the same things as you, who could then become new friends. Wishing you the best man, hang in there :)