What do you do when you can't forget someone?

When you love someone you can't have what do you do? I have put in more than enough distance and I have convinced myself that my feelings are irrational and impulsive, but I still can't quit thinking about this married man. This is really unlike me. Usually when I can't have something I get over it quickly, but it's been a couple years now. Then again, it's not too often that I want anything very badly. Furthermore, I'm against cheating and I've always despised the thought of homewrecking.

From what I can see he is a loyal husband, although my attraction makes me feel like he would blossom with someone more compatible. I have picked up subtle clues that he is attracted to me, but I would never want to discuss it. Sometimes I entertain the thought of telling him and then just never speaking to him ever again and deleting him from my social media but I would miss him so much as a friend.

There are times when I am free from these feelings, but still in the back of my mind I feel like we will meet again later in life and be ready for each other.

I'm even more freaked out because I feel like my mere thoughts can be enough to destroy his marriage and I don't want to cause anyone any harm. Somehow, someway I tend to get what I want, especially if I want it very badly.

Why has this man challenged my values and how can I make it stop for the sake of my own sanity?