Say what you like, but yesterday I made my roommate feel insecure and it doesn't bother me.
I'm not sure what to say. How did you make your roommate feel insecure?
I told others personal information about him and now he feels insecure.
You should not tell private information about your roommate to other people. It seems like you don't like your roommate and if that's the case, you should move out. Hurting your roommate because you don't like him and you want to make him feel insecure is not acceptable.
I did it in order to get him to move out.
If you have an issue with your roommate, you should be the one to leave, not him. Making him feel bad so he doesn't want to live with you anymore is the wrong thing to do.