I dont know what to do..

[Septhy]

Hi,
So I am having relationship issues with this girl. We both really like each other but I'm having issues with her having affairs with others. I'm not angry or sad about it. I still really care about her... i actually really like her more than before. Its just that I feel scared and insecure because of that. I used to talk to her, but now when I try to talk to her i always hold myself back. But I really want to speak to her and I constantly keep trying but I never am able to. She thinks i'm following her, and I told her that its difficult for me to talk to her. I know she feels insecure and scared how i'm treating her and I don't like doing this either... I hate it.... I need her help to get through this and thus I need to speak to her, but fear is holding me back too. I'm worried that she might be sad about what I want to say. I know what i need to do... I need talk about it.. but i dont know what to say..
Would I also need to see a physiatrist to check up my mental state of fear?

[Chupacabras]

Could you maybe clarify a few things?

1) Have you both agreed that you're boyfriend/girlfriend?
2) Could you clarify what you mean by "affairs"?