It sounds like you are unhappy with the way things are in your marriage. The best thing would be to talk with your wife about it. I understand it's usually not that simple and certainly is no guarantee that you will have your needs met. The issue you have originally brought before us is, "Would it be cheating?"
Though related, it's a separate issue from, "My needs are not being met in this relationship."

__________________
Put me on wheels and I'll turn tricks.

Clever? Nah, I ran out of that years ago. But if you find this, let me know, k?
"The road goes ever on..." ~ Tolkien

In memory of my friend skip...
Go then, there are other worlds than these