So is he into me or just friends?

I recently came out of a LTR and moved back to the area where I am from. About a month or so before this I had an a guy I used to date in HS look me up on Facebook trying to figure out if I was single or not. I told him I wasn't and that was that.

So anyway, while on the way back home, I posted a message that I was coming back for good and the next day he pops up and wants to know why. So we talked back and forth for a few days and he always seem supportive and never creepy or anything. So now of course I'm starting to like him again, I always did before, but I had a on off boyfriend that I couldn't let go of. So I finally worked up the nerve to ask and see if he wants to hang out sometime and he invited me to his house for dinner. My question is What is this guys intentions? Guys don't usually make friends with girls unless they are interested in them in other ways am I right? Is he expecting a one night stand? HELP!