I'm going to tell one of my suite mates that I don't want to eat with her
Why don't you want to eat with your suitemate?
One of the main reason is that she is too annoying, too bossy and controlling with me
Being honest with people is a good way to ensure that someone knows how you feel. Being honest with your suite mate will help her to understand how her behavior and actions have affected you.
Don't you think I should keep it to myself?
No, it's good to be assertive with people who are bossy and controlling.