How about, "The last thing I want is a relationship with somebody"
or
(when she is moving out) "I am not going to date anyone. That's the last thing I want. But you can date if it will help you to learn how to connect with people again."
and my favorite
"I need to find out what it is like to live life on my own with nobody else"
I am tempted on a regular basis to ask her how that whole "Living life by herself" is going, LOL
