I met this guy a couple of weeks ago and we really really hit it off, we've been texting and talking ever since and he's looking to take the next steep which would be to start dating. I tried not to string him along even though I really really like him because I don't know how I feel about this age gap between us. He's turning 26 in a month and I just turned 18 a few months ago.. I know my parents would never be okay with this but I try and think "It's my life, I should live it for me." but I'm still not sure what I should do.
Is it normal to date someone that much older than you when you're still in your teens?
Should I stop talking to him and move on or should I keep going and see where it leads?
Is it normal to date someone that much older than you when you're still in your teens?
Should I stop talking to him and move on or should I keep going and see where it leads?

I think the normalcy of a teen dating a mature older man depends entirely on which country you live in. It would be frowned upon if you were from the USA or Canada, but not if you were from France or England.
If your parents don't think it's a good idea, then it probably isn't. You might not agree with them, but they know more about the world than you do. And if you still live with them, it's their rules until you move out.
Ofcourse it's normal, it's not a big age gap.
I knew a 17 year old who LIVED with her 28 year old boyfriend, and no one gave a shit or thought anything of it.
It's much more common and almost expected in society for the man to be older.
It's not the age gap I'm worried about, 18 is still a young age. You're still discovering yourself while he's already done that. It'd be more okay if you were 20 and he was 28. You're not as mature as you think you are when you're 18. Once again 18 year olds and 26 year olds want different things out of a relationship.
Does he mention settling down? Does he mention children? Does he show no interest in your stories? (unrelateable) Does he ever give a harsh "grow up!"? Does he ever act elitist to you? Just keep an eye out for signs that things are going downhill because of the age gap and then you'll know if you should stay or leave him.
But he doesn't even mention the age thing, he only mentions it to see if I have a problem with HIS age, but he seems to have no problem with mine.
We're married now. That age difference really isn't a big deal to us. 26 really isn't that old =/ I know some people FEEL that old at 26 (lol), believe it or not, they don't ALL die at 30 XD