Why hasn’t he asked me out?

So my best friend is a guy and we’ve been best friends for a little under a year now, but for the past like month or two it’s kind of escalated into more than that. We cuddle, hold hands, and flirt all the time so people ask if we’re dating all the time. We kind of act like a couple but neither of us have really talked about it. Like at all. People are starting to talk about us now and it’s really started to get to me. Any idea on why he hasn’t asked me out?? It’s really stressing me out but I don’t want to make the first move because he’s the only person I trust and I don’t want to lose him if he doesn’t feel the same way. :(

UPDATE: he just asked me to homecoming!! I think I know where we stand now and I have a feeling he’s going to ask me out soon :)