Is it normal that I have no desire for a relationship, im 18?

I have been in and out of that feeling..it's different for everyone. Everyone's background is different. I wasn't in a serious relationship until I was 19 (intimate). Later, I was married and divorced and not interested in dating for a few years after that..then ended up happily remarrying. You have a lot of life left if you live to be 80...so do what feels right for you at any given time. There may be some ups and downs..I have sure been there.