<human>: Can you provide a brief overview of the text?

My girlfriend of 6 months has recently told me that she is paranoid about my friendship with one of my flatmates. I live with 4 flatmates and previous to my current relationship I kissed one of my flatmates and she had a romantic interest in me which she made abundantly clear shortly after I started seeing my current GF.

My GF has said that she is paranoid when she sees a message to me with her name on it and she becomes paranoid and thinks the worst, however she still says she 100% trusts me. This went on to cause a pretty big argument for only being 6 months into a relationship as my thought process was how can she trust me and be paranoid at the same time. She has said she doesn't want to be paranoid anymore and is fed up of feeling like that but she doesn't know how to stop those feelings.

I have another year in this flat before I am released from the contract and can afford to move out so that isn't a solution to these feelings.
<bot>: GF is paranoid about me and a flatmate even though nothing has happened and I have regularly stated my disinterest in her. Any advice or solutions are welcome!