It sounds like you're not just craving sex, you're craving love! That's nothing to be ashamed about. Everyone needs to feel loved and special, and for a lot of people sex is an important part of that connection with another human being.

My first advice would be to try and look at it from a "lack of love" perspective. Figure out what issues have started to drive the two of you apart, and see if any are fixable. Maybe the kids are really stressful and you two never see each other? Maybe someone's dealing with grief or a long term illness? Maybe you two just simply lost touch along the way. But trying to reestablish that connection will ultimately help bridge the way back to physical intimacy~

I wish you all the best. Try not to make any quick decisions, and whatever you do keep your wife up to date! Communication is the key. (((hugs)))