how can i learn to stop being so obvious about my crushes?

Yup i am a girl. Luckily, in my case the guy doesn't know. I have no plans of telling him or anyone else because he is engaged and happily living his life. I am trying to avoid him so that he stays happy and the girls don't get a chance to tease me. I don't want to vanish all of a sudden so i do chat with him once in a while.

To make it less obvious, only we can do something about it that is take a step back and control ourselves. Dont look at her much and dont talk about her to others at all. As for being teased, either tease back, ignore or give a proper reply back so that no one does that again and is beware!