So there is this guy (duh) we work together and have been caught looking at each other. It built up to him staring at me intensely and it also seems he had been avoiding me. I had recently found him on Facebook because of mutual friends, I added him and he accepted. He seems to be friends with my ex from 2 years ago (we weren't serious). Also he seems to be going through a rough break up. I messaged him "Hope you're having a good day :)" we talked about work for a bit then he stopped replying. Monday at work was just the same as always. What should I do? I need a guys perspective.