Before saying anything, I wanted to say first that I feel that I'm in the same boat. Or I was to be accurate because I've chosen to be alone after failing so many times, and I'm no longer trying to be around people.

People don't care. If you don't have something to offer people, forget about it. You would be lucky to find a girl to accept you. That's probably more likely than people liking you in general. I would be satisfied if that happened to me. So, you either change which is a painful process, or accept yourself and be hopeful that someone will come and accept you.

I'd also suggest not to include your brother in your social life if he is a source of stress to you. My brother when I'm home goes out with his friends all the time, while I stay at home with no friends or any one visiting me. I'm fine with that. I feel actually happy for him because he is not experiencing the pain I experience, hopefully.