I think a lot of people here shere that feeling and honestly to me having a friend here will never be the same as an IRL friend, but at least you can practice here. Socializing is hard, but it is a skill that can be learned, it won't be easy, but it can be learned, my therapist has been trying for two months to get me to just talk to people, just ask their name... before that conversation I had never realized how much I avoided even asking people their names. Well I did it once, asked the doorwoman her name...it's something.
I guess the idea is to talk almost randomly to random people, people you are probably never going to see again, so there is no pressure to "say the right thing" if you end up as ackward well, chances are you will never see them again.
I don't think I am in a good poosition to give advice here, but that is waht my therapist told me. Just get used to the feeling of being noticed, of talking, saying something, anything...what you doesn't matter that much chances are people will have most likely forgotten it in a week. Still finding conection isn't and easy feat, and I can't promise you will succeed, idk.
Good Luck