Background: I am male 18 years old and I'll be attending university this fall.
For the past five years I've been attending an all boys' school, and this coupled with the fact that I've always been quite introverted means that I've never really been interested in dating and whatnot. Most of my peers already have girlfriends or are actively searching for one, so I'm quite alone in that I'm really not interested in dating one. I was usually too busy with studying to care anyway.
What really brought this to my attention though was attending my school's graduation banquet a few weeks ago. A lot of boys brought girls with them, and I remember feeling so put off by seeing these girls. I couldn't help but feel exhausted when imagining romantic relationships with them. I do find these girls attractive, some very attractive even, and I am 100 percent certain that I'm straight, but I just have no desire for them whatsoever. Again, the idea of dating and anything related instantly makes me feel exhausted. I don't think being in university will help either.
I don't want girls, I have zero interest in sex, I can't imagine being tied down by raising children and having a family. So really, I've been seriously considering staying single for the rest of my life these days - I had always entertained this idea. However, I don't think this is a realistic path. For one, my parents really really really want grandchildren, so I feel that I'll be letting them down if I don't marry. I'm the only child too, so I'm their only hope. I'd hate to see them lonely and sad as they grow old. I also really don't want to die alone, and I'd really want to have someone close to me when I pass. Plus, the idea of not having any descendants just sounds so depressing. I mean, I'd be happy if I can just undergo mitosis and have children that way, but I don't think that's very likely to happen.
What do I freaking do?