You're not the only compulsive cracker my friend, and you have nothing to worry about. You can be a constructive cracker. I mean you can use the need to crack to your advantage in overcoming anxiety. OCD is label for something that isn't fully understood, but if the cracking is making you worried (or just not in control) you should seriously look into acupressure.

I have been working with a therapist for a long time, and drugs are not what you need. I too had the compulsion to crack my back and other joints (and still do), but by using certain pressure points to release tension we can feel more relaxed and still get a nice satisfying crack.

Cracking doesn't always mean you're wearing down your tendons or any of that bupkis, in fact chiropractors use healing techniques that realign bone structure often resulting in a fantastic, or painful feeling crack depending on the injury.

Wanting to crack your bones isn't a bad thing. Embrace it and use it in a non damaging potentially constructive way.