What really helps me think this sort of stuff through is kind of going through a set of logical questions rather than letting my emotional brain handle this. Why would they? What would they gain? Why are you nervous? What's the real root of the fear? Has she really done/said anything to warrant this paranoia? You can also ask others about their character :)

Sometimes your gut feeling about people is correct ... I would just be careful about what you share with her.

I had the same thing recently. I ignored my feelings and. Shared with this gal the fact i liked someone i thought it was safe because she had a boyfriend and seemed happy. But then both the guy i liked and her started acting weird. Turns out they slept together they lied to me for a month then it came out the day i started feeling like something had changed and i should not trust her. Anymore. Her boyfriend broke up with her and then the guy i liked that she cheated on her guy with didnt end up dating her he got with a totally different girl she tried talking to me again i blocked her number and would not talk to her anymore. I just would be careful how deeply you involve her in your life. Just because we have a disorder doesn't mean our feelings are always just paranoia. I didn't distance myself from her soon enough and limit what i told her.

I say trust your gut feeling. Have you ever felt this way about someone before?