You have a crush on a guy working in your office and he seems to be interested in you,too. He appears to have a very very busy social-life going out with someone(or different people) very often. Therefore, you're not sure if he really does you or not, or if he really is single. What did he do last Monday? Who was he with? How about Tuesday? Wednesday? Thursday? Last weekend? Does he really have so many interests? You have some of the same interests as he does, so tell him this. Then, he might ask you out instead of someone else.