f/21 never been in a relationship

I'm a 21-year-old woman and have never been in a relationship before. I've never even kissed anyone properly or anything. It's not that I don't want to, it just doesn't happen. I used to go out partying a lot and guys would often approach me there, but I just don't want to get involved in something casual like that. For me it's something intimate and I want to experience something like that with my partner, at least with someone I feel something for. It's not that no one has ever shown interest in me. But it's never the people I feel attracted to. I'm not often in a situation like that, but when I see how quickly other people change partners, it really affects my self-esteem. I actually feel pretty and people tell me that too, but I still have doubts. Sometimes I also doubt my character: am I too boring, too weird or something else? But I actually do have a lot of interests and hobbies. Maybe I'm just too picky and should get involved with someone? But I'm afraid I'll regret it. Maybe I'm ruining my chances by being too reserved. I really want to find someone I can connect with and who I feel attracted to, but unfortunately it's not happening. I didn't really care about any of this before, I always thought that everything would work out, but towards the end of the year I'll be 22 and it's just starting to feel uncomfortable and embarrassing. Do guys even want to get involved with people like me? No experience, nothing, and already in my 20s. Doesn't that look weird? I wouldn't mind if a guy had no experience, I honestly don't care about that sort of thing, maybe because it applies to me too. But I've been thinking about it lately and as I see my life passing me by. I'm just scared of ending up alone. I just don't know what to do.