My crush likes my best friend and asks me about her?

So I have a crush on this boy, (we'll call him Mike), and I've had it for a little while. I think I started liking him a couple months ago, but that's beside the point: He likes my best friend. (We'll call her Ashley). She doesn't like him "like that," but likes him as a good friend. He asked her to the spring formal, (which crushed my fantasies of him asking me), and she said yes because she didn't want to be mean, and she thinks of it more as going as friends. He and I are also friends and text almost every day. Frequently he asks my other friend and I why Ashley isn't texting back and if she's mad at him. (Very creepy and overbearing, right?) We tell him that she just doesn't feel like texting anyone, and that he just needs to calm down a bit. Ashley is starting to get a bit annoyed and creeped out, not only that he's bugging her but also us. My other friend and I have told him many times that he needs to give her some space and that she doesn't like him in that way. He of course doesn't listen. Everyday when I talk to him, it makes me feel warm inside, but not really nervous. I'm just really confused and a bit of a pickle. I would tell him that I like him, but it might make things weird, and he would never let go of Ashley. I mostly just needed to vent, but if you have any advice for me, please reply!! I'm sick of giving relationship advice to Mike when I, ironically, like him. Please give any input! Thanks. :)