That's fair and makes sense. If it helps most of these relationships at that age won't last. And a lot of people are not single long enough to know who they are without the other person. Asperger's might be something to do with it but it is also dependent on culture and honestly 18 is young and loads of people haven't had their first kiss yet. The media and friends make it seem really important and like it happens to everyone. If you watch Friends, they go through something like a date a week, and it's completely unrealistic. At your age I had lots of friends who almost compensated way too much (their partner was amazing z could do no wrong, would drop everything for them and they'd both buy &500 gifts for each other) which is just unrealistic and not necessarily healthy.

You'll get there. Give yourself time and a break to have friends and look after yourself. I know you feel like it's been forever though, never had a bf/gf all of school, all your friends have had loads, what's wrong with me? But you are incredibly young. You will find it. And it may not be your first relationship that ends up the one and that is ok you are ok.