Problem with girlfriend who may have Paranoid Personality Disorder

Hello all. Just want to give you a quick rundown on my girlfriend and hopefully you can help me to help her.
-She's 24 and we have been going out 1 year. We love each other very much and outside of this problem, we have no problems in the relationship
-3 years ago, her ex-fiancee cheated on her and they had to call off the marriage. She does not love him anymore but that situation really messed her up.
-She has serious trust issues. This may not make sense. But she DOES trust me 100%. She knows I would NEVER cheat. However, if I tell her I'm at a bar or with a friend who is a girl or any situation where I am possibly socializing with a girl, she will have a flashback to her old relationship. She will then get thoughts in her brain about me. Like she will basically think like "Why would he do that" or she will play out scenarios in her mind and just run with it. She knows I'm a great boyfriend yet she knows her thinking is wrong but she still says it's hard for her to get over her feelings. I tell her that these are just THOUGHTS and thoughts can be changed but she does not seem to agree.
-Thus, when she gets in a situation where she thinks something real negative and runs with it, instead of talking to me about it, she just pushes me away. Like she doesn't want to bring me down so she just won't talk about it. She also doesn't want to tell me about her problems because on one hand she doesn't want me to just say "Oh that's silly" because she thinks that her feelings aren't silly (and to a point I agree) but she also doesn't want me to agree with her feelings either. Like if she has a thought about me doing something wrong she doesn't want me to say "Yeah I deliberately made you feel like that." It's almost like she has way too high of standards about people (mostly me). Like if someone doesn't talk to her exactly how she wants she will get a though of "Why is this person talking to me this way instead of that way."
-I have tried to talk to her about what actual thoughts she has but she won't really tell me because she says the actual thoughts aren't the problem, it's really WHY is she thinking these thoughts
-The REAL problem beyond all this is that she just doesn't want to talk about this. Whenever she feels a certain way she would rather just tell me "I'm good" or "I'm tired" even if she is thinking very very negatively.

Someone before suggested to me she has Paranoid Personality Disorder. Before though I JUST thought the problem was her thinking I was going to cheat but it seems she almost has too high of expectations now and has all kinds of thoughts about me. She knows I'm a great boyfriend too and she doesn't like her negative thought pattern. It's making her think she is crazy and also depressed and it's become a serious matter.

Any help is GREATLY GREATLY appreciated. Thank you so much for your time (FYI she doesn't want to go to a counselor because she would have a hard time talking about her problems).

Hello anthony,

Most people with trust issues don't want to see a counsellor because of trust issues. Is your gf on medications for her ilness? Meds go a long way to helping sort out the thought issues and compulsive thinking. It would do her the world of good to be able to see a pdoc if only for that reason. It would go a long way to helping her and you too, to get over the Obsessive thoughts and that is one thing she needs; freedom from those thoughts really do make such a huge difference. I'm off to bed now so you take care I'll write more tomorrow,

Good night,

Rhiannon

Hello. I appreciate the response No, she is not on meds. I do not know if she would go on them. I guess it can't hurt to try. What meds would be appropriate for a thinking disorder such as this one? I doubt she would want anything too strong.

I dont really have any contructive advice to offer except that personally I can relate to your girlfriend as I feel the EXACT same way often times. I dont know what to do about it myself so I have no advice other than she is NOT alone in these feelings and you are NOT alone in the sense that my husband is in the same boat as you. I've been struggling with this for years now. My trust issues began prior to my last serious relationship which further advanced them.

I know that she says she does not feel comfortable talking to a counselor, but perhaps she might be willing to take some of the quizzes that are available on this website?
My other thought was would you be willing to go to the bookstore and check out the self-help section? There are probably some good books for couples dealing with relationship issues? If she would be willing to read a couples book with you, it might help open the door for you guys to be able to talk about things more openly. Perhaps something dealing with couples communication?