I want my ex-roommate to pay me back the security deposit from two years ago.
Why do you want them to pay you back?
She owes me the money and still has not payed me back.
Friends should always pay their debts. So, it's normal that you would ask her to pay it back. Just don't be aggressive when asking for it back.
Yea, I won't be rude about it. No worries asshole.
Then I think you're going about this in a good way! I think she will be understanding since I'm sure she knows that she owes you the money. Hopefully it all works out well for you.