I'm 19, he's 27. We work together and see each other most days. He's pretty quiet/shy and generally keeps to himself but we talk quite regularly and he's lovely. We make each other laugh a lot too. I know he's single and want to ask him out but I've never had a relationship before so don't know what I'm doing. I don't want to make anything awkward if he says no and I'm not even 100% sure if he's into me. We tease each other a lot and I catch him looking at me quite a bit. I just really like talking to him and want to get to know him better.
So what should I do?