I am 18 years old and I have been with my boyfriend for about 3 years. For almost the entirety of that time I have been having sexual fantasies about his father. I don't know how to feel about it, and I feel like I'm crazy. Every time I'm near him I can't talk because I feel like I might say something that might tell him how I feel. Essentially I turn mute. I'm scared because I love my boyfriend and I just want these fantasies to go away.