My dear, you are only 18 and worried that you have never had your first kiss? I won't even tell you how old I was when I had mine, but let's say it was much later than that. I was just shy and didn't really trust men, etc.
I eventually found a guy who fell for me hard and was actually pleased that I hadn't been in a relationship before. My first kiss with him was absolute heaven!!! Well worth the wait. I was with him for 7 years.
Don't even worry about "everyone else." In fact, why do you really care so much about it? Because it makes you feel "different"? So what. Enjoy being single. Work out whatever it is you need to work out. Myself, I'm pretty proud that I haven't "been around the block" like other women my age. (No disrespect to these women.) And, the kind of guy I would attract is, IMHO, more of a keeper than someone who would be disgusted by it.
By the way, you'd be surprised how many women (and men) have been sexually abused....