I'm going to ask my roommate to leave so I can hookup with someone
Why would you want to ask your roommate to leave?
I need my freedom, I want to hookup right now.
If you've agreed to share a place with someone, they have as much right to be there as you do. Your romantic life has nothing to do with where they live.
I don't understand why my freedom to hookup with someone is being restricted just because he won't leave.
I understand your frustration, but it's wrong to ask your roommate to go somewhere else so you can hookup with someone. How would you feel if they asked you to leave your own home?