Sorry for confusion
But it sounds like you mean tell your partner you want be non-exclusive as opposed to your current relationship, which your gf considers exclusive I take it?
You are right I am trying to tell her I want to be non-exclusive even though she believes we are exclusive. I think she will respond negatively to it but after reading a lot on the forums here I know to start i need to be open to her about how I feel about my friend btw this is not the first time we've been through this. I've just always tried my hardest to fight what I was feeling because I was told it was wrong and I should only love one person.