Is it weird that i regret not having a childhood romance?

And that I feel really depressed because of it? I'm in my early twenties now and still have never had a first kiss, or any sexual or romantic experience. And I think part of that reason is because I never had those experiences or experimented while I was younger. Even when I had the opportunity to. And I wish I could just go back in time and do it again so I could not feel this way right now, of missing out on something. I get depressed whenever I watch High school romance movies or anime or shows, or my friends talk about their first romantic experiences. I just feel like crying. What can I do? I no longer find people attractive even. Would things have been different if I had had my first kiss at a young age? Would I be happier? Is it normal to wonder about this and feel such a big regret like a hole in my heart, due to never having these experiences? And it's not like I'm interested in a relationship now. I gave up on ever finding love. I'll be alone forever, because everyone else my age has had experiences I haven't and mentally I'm nowhere near on the same wavelength as them and feel like if I were to get involved with them, that they would easily take advantage of me since I'm vulnerable and naive. And don't say "don't worry you'll find someone" because I know I won't, not now, and I don't want anyone now. I resigned myself to the fact I'll be alone forever. It's fine.
Also for context, I'm a female.