I get how you feel. I'm 30 now and have been in a relationship for 5 years. But when I was your age I was in the same position as you. What helped me was exposure practice. I went online and met a couple guys and decided to just meet them. Just one meeting to see how it went. No pressure or expectations. Maybe you can try something like that. Just find someone to hang out with and push yourself to just go meet them. The more you push yourself to get out there, the easier it gets.