@CoastalRat,
I don't have interest in him in that sense. Like I said, he's a good friend.
I might sound like I don't want to swallow my pride, but I don't want to look like an idiot if I ask him about his behavior.. Maybe he thinks nothing of it and I'm left looking stupid for taking what he does too personally.
And no, his father and my mother are not in a relationship, he is just a very good and old friend of my mother and they have run into a few issues at the place they live in now, so my mother offered to help. I wouldn't want anything between us to expand beyond friendship, you're right when you say that it could get messy.