Does he like me?

This guy at work is so cute (I'm gay and so is he) and all i knew about him before today was his name. We work in very different divisions of the organization. I asked him to lunch and he smiled and gladly accepted. We went out today and he smiled so much and seemingly blushed a lot - but i can't quite tell. Anyways, when we got the check, he said he wanted to buy me lunch. I said no at first but he replied, "well maybe you can get the next one." Does this mean anything? Or am i overthinking it?