Is there a way to get rid of an unhealthy fantasy?

Thank you both Dr.Lane and LoveLoveLove, I sincerely appreciate both your support and advice. Dr.Lane, you said to direct my energy elsewhere, I do do that, and that is I obssess over Taylor Swift, I obsess over her, I watch her video blogs in loops for at least 7-8 hours 2 am in the morning. I dont think it is helping me, because it causes me despair too, because it gives me sadness, because it feels like this disease is forcing me to give up my love for her. Also I do do yoga, yoga helps with anxiety, but now I dont get that much anxiety, just despair. Before it was anxiety, but now not so much. Just sadness. Dr.Lane, is there a way to get rid of a fantasy? I think if I direct my energy to getting rid of an unhealthy fantasy, than it will get better. I think there probably is, because it is not like I am changing my sexual orientation or anything. I know I am straight, I know deep down I am. I am almost 100% sure I am straight. But if I get an occasional homo fantasy, which causes me despair, and too be honest is not healthy for me or others around me. Because it is nothing but the occassional homo fantasy that causes me to be depressed and want to go terminate my own life. They say healthy fantasies are good, but a fantasy that makes you want to brutally harm or maim yourself isnt healthy. I have communicated this to my therapist. I guess this is the reason why she thinks I dont have OCD, I have a problem with depression, I know if I dont get the ocassional fantasy, I will be able to get better. But many OCD people obssess over an irrational idea. Some people tell me that I should accept what is, but I know I cant accept it because, I wont feel like a man if I did. I have always liked feeling macho, I cant look at myself in the mirror if I did accept it. Dr.lane, might this be just be a phase? Will this phase pass? Because I really never had any occasional homo fantasies 5 months before. It started in january of this year. And you cant really say it because of puberty or anything, because I am almost out of the puberty period. I am not going through an identiy crisis, because I truly do know who I am. I just want these ocassional disturbing fantasies to stop. So I can stop wanting to take my own life, when these fanatasies drive me to the edge.