I work as a cashier at a store and there is this guy who comes there pretty often, at first I didn't think all that much of him but then one day he was there and we talked about where he works and he told me he liked fixing things, I asked him if he liked working on cars or trucks he said yea here all right. Then after he left I was told to take my lunch break, I was walking through the parking lot to get to my truck and I saw him getting in his truck to leave and I smiled and waved and he smiled and waved back. I wasn't to my truck yet but I had to stop and wait anyway for him to drive by. Then a few days later he was back and said so you drive a chevy truck? And I do but I asked how he knew and he said remember the other day when I drove by you when you were leaving? And I said I remember. But I know for sure I wasn't to my truck yet.
After I finished ringing up his stuff he stayed to talk until I got another customer. He smiles a lot and is really nice and easy to talk to. Then it was like a week or so later until he came back again and I asked where he had been he was telling me he got a new job so he had been working a lot. We couldn't talk too much because it was really busy that day. But I told him to come back to visit soon and he said OK. He remembers things from our last conversations. He actually comes up with things to talk about. I kind of thing he might be interested but I just don't know. I also don't like waiting till the next time I see him again at the store.. However I think it might be to soon to ask for his number?
What do you think?

Who knows what he's really thinking. He could be scared of rejection, he could be only friendly. We can't read his mind, but no one is going to stop you from taking the initiative and asking him for his number!

I think that the timing and the circumstance (being as you only see him when you're working) is perfect.

Being as you're the girl, you could just give him your number instead of asking for his, guys really can't get away with that.

I recently went though this deliberation with a girl I'd been staring at—not even talking to, mind you—for about three years. I saw her once or twice a year, creeped on her every time from far away. Never knew her name or anything about her, but a week ago, I just went up to where she was sitting, sat down next to her and talked for a bit, and then asked for her number and she gave it to me.

I think you'll be okay.

A casual friendly talk, and you can always ask for his number or give your number to him.
You are acquaintances already, nothing is wrong in going for the number.