Feelings are not easy to control. There is no way that logic and reason, will change your feelings. If you have a crush (which is an infatuation), you would enjoy being in the presence of this person, but you would feel the need to further the relationship. There is nothing wrong with that. If you have an emotional attachment (closer to romantic love), that when it becomes really dangerous. There is a part of you that wants to pursue it, but the smarter part of you, knowing that you already have a good life (one you don't want to leave). If it is the 2nd, you will have to break your heart and give this guy a lot of distance. You will have to mourn the potential of a relationship, because in a different life, you could have pursued it, but now, you will not and cannot. It will hurt, but you need to experience the heartbreak and move on from him. If you don't want to move on from him... you have to be ready to be single, before pursuing a relationship with him. I don't think you really want that. If you want to give your mind something else to think about, why not distract yourself with a hobby or create more intimacy with your husband. If you have thought about what is drawing you into an emotional attachment with this guy, maybe you can figure out what is missing in your current life, and try to find a way to recreate in a safe way. Its worth a try.