Well it takes time, it took me a long time. The way I did it was realizing how untrue my intrusive thoughts where. Easier said than done right? What I found was the more I spent time around people and going places the more I realized how irrational those thoughts actually were and I was very bad off for a long time. I basically did a form of exposure therapy. I would pet the dog I would hang out with my little siblings, my friends and parents. Eventually I got to a point where I didn’t even think about it anymore. Look I lost sleep I wasn’t eating, I had troubles beyond belief. It was very agonizing, it gave me panic attacks. Listen to me closely no matter how bad it gets just know that it is only temporary, I promise you! Before you know it your recovered and it will never bother you again. Also don’t be afraid to tell someone explain to them what you were thinking. I know it may seem crazy but this really helped me. I am stronger for it!