I'm going to tell my roommate I plan to get a cat.
What made you decide to get a pet?
I think getting a cat would help me to relax and feel less angry.
You should find out if your roommate has cat allergy. If she is okay with having pets, then go for it.
That's a good point. I don't know if she's allergic.
If you're not sure then you definitely have to find out before getting a cat. It would be really awful if you got one and then found out that she isn't able to be around them.