I have to agree w/Kalni b/c if the urge to kiss him strikes, let him have one and go from there.
I wouldn't worry about anything w/him other than the now, so be his friend, invite him out (like M suggested), and contact him every so often.
You've got zero to lose and everything to gain. Remember, he's stated how much he's missed you, so some friendship and a little teasing/flirting can't hurt your cause, my lady.
