Guy on the side

So I’ve been talking to a guy that I went to school with and we’ve hung out a few times..Never in a million years did I expect things to turn out the way they have. He’s athletic and gorgeous and I’m not attractive, overweight and never thought he’d be interested. He’s asked for head and I’ve given it twice. We’ve been chatting for almost 2 months and I’m not sure if he’s sincere or just wants oral. There’s no making out or anything else. Any thoughts or suggestions are welcomed.