If you aren’t in a relationship with someone of the opposite sex by 25 then why start at that point?

I don’t get why we have to be in a relationship by 25 in life. I’ve never been in a relationship with anyone. I’m 18 and I don’t want one yet. I’m not ready and that’s okay. I don’t see why it’s a big deal if someone never finds a partner unless they want one. Forcing yourself into a relationship can be bad if you’re not ready. I don’t know if I want kids but I know I’m not ready yet. I’m barely an adult.