What would you do?

I'm 21 and my birthday is in December and I'll be 22! This boy that use to have a crush on me in high school lives right next door to me for almost a month now. Weird huh? Lol , i never talk to him in high school cause i was a senior and he was a freshman. well he told me some weeks ago that he still like me and I can't lie I like him too. I've been single for 7 months. The only problem is he is 18! I know age is nothing but a number and he is grown! he has 2 handsome little boys and that kinda makes me nervous and I have no kids. But maybe I could just go with the flow and see how things turn out. What are your ladies opinions?