I have a shameful attraction for my boyfriend’s best friend and I feel like I want to f*** him every time I see him. I admitted to have cheated once already (for reasons of thinking it was being done to me) and he forgave me. I cannot bare to make him feel like I don’t respect him or our relationship because I do, but these feelings are really taking over me. I dare not act on them because I know what the outcome will be, but I can’t seem to get his friend out of my head. It’s really making me feel like a s***. I hate these feelings. Any advice?