How do you let go?

I think I may be one of those people who just over analyze everything. But that’s how it goes sometimes. I'm in the middle of a situation where I need to let go of something that I actually want but know isn't good for me right now. I was in the middle of puzzling how to go about this when it occurred to me that every time I've had to let go of something in my life up to this point it's been a situation of release because there is no other choice. People die, families move, friends get married, and you move on because you have to. Time plays a big part in this as well as just the idea that there is nothing you can do about it, it's completely out of your hands. But how does it work when you know you need to let go but you have another option, albeit not a healthy one for your emotional or spiritual well being, but another option nonetheless. Somehow it makes the situation more difficult. No matter that on paper it seems so easy. "Well really an option where it affects your emotional and spiritual well being isn't really and option" Yes and that’s the reason for this blog, however that doesn't help me untangle my emotions from the situation, nor does it give me practical things to do to help me move on. I just want to feel like I can do something, It can't be just time that heals. Sometimes we need a little doctoring and therapy too. My dilemma? What to do. What to do! What to do?