Jodi,
we've never met and I'm new here, but at the old saying goes "Be careful what you wish for"
Im 35, and have made my share of "passionate mistakes" so just be sure you know what your getting into with him if you take it any further.
Dont get me wrong, if that were me, I would have begged to stay after the 5 min make out session, but 18 year old kids, are stil kids. Attachement, going crazy saying there in love with you, beleive me I know from experience, he either is fine with the on eand doen, or is going to be all up in your shit for a while.
As long as your ok with the ramifications, enjoy the younling.
If I had an 18 texting me and wanting to bang my brains out, I dont htink I woul dhave even thoguht about it this much