HELP! crush on a coworker

I have a crush on this guy at work, and I feel like the feeling is mutual but I'm not 100%. Plus even if we do like each other, what do I do next?! But I feel like he might be interested because, we talk a lot of work about personal stuff, we can make each other laugh (and he usually comments on how he thinks I'm funny), and he is sweet and we casually touch sometimes. Also we ran into each other at a bar, he was with other co workers and I was with one friend. Later when he got separated from our groups and we talked for a while and a lot at the bar. My friend wing-womaned for me and we they were alone catching up to me at the bar she said "so are you going to buy her a drink, or what?" And he did! When I saw him again he asked about the rest of my night and I found out more stuff about him. I feel like it is, and I don't know if I should give him my number or if I should still take it slow. HELP.