Hi! Welcome! I am not quite sure what you mean... U can be obsessive about a person u care about without having OCD. If that makes sense. You are doing a right thing by limiting contact. I suggest seeing a therapist about it. It sounds like you are maybe relying on her, or she is filling as u say "a mentor role". A therapist could assist u one examining why u are feeling like u need a mentor in the first place. And they can assist you in challenging the reason why u feel like there are voids that need to be filled, if that makes sense