A Late Night Mishap

So last night, I was closing up at the café when this one regular guy came in. We always chat and flirt a little, but it's never gone beyond that. But last night, he mentioned how stressed out his week had been and asked if anyone else stayed around there late. Before I knew it, I found myself pouring him a glass of wine and offering to stay up with him just to talk. It felt so wrong, like breaking some unspoken rule about our relationship being strictly platonic. Yet part of me wanted more... Now I'm not sure what I want.