I have noticed a co-worker looking at me lots in the office. There has been the odd passing comment, but he is in a different department to me so we rarely cross paths but I probably see him once a week in passing. However when we do his guys are glued on me. He is quite a bit older and in a much more senior position than me. I’m feeling quite uncomfortable and I don’t know how to act. I’m worried things will escalate, although part of me is flattered. Can anyone offer an advice of what to do? I’m hoping if I keep my distance and just be polite he will get bored and move onto someone else?