Okay, so some good suggestions here. I decided I will email him this week and let him know I'm interested but a little skeptical of how this will work, and a bit cautious, and also that I would like to get to know him a bit via Skype before he comes back. I want to find out why this kind of LDR with me is appealing to him, and will tell him that I would like to take things slowly. And then I am going to make every effort to verify whatever he tells me. I kinda feel a little weird about asking him to be in touch with his friends here (he told me there is a group of people he knows in the city), but if he is hesitant to "introduce" me to them, that tells me something. I am really not sure how attracted to him I am, so I will only bring up the issue of STI tests if we start to build that sort of sexual attraction and it gets nearer to his coming back. If I don't really feel any kind of sexual pull toward him, we can just be friends - and I will see what his reaction is to that.
Hot chick in the city.
Oh, oh, can't you see? Love is the drug for me.