Huh ?
Is he only good for sex ?

Sit down, think and ask yourself this
Your husband does anything else that make you happy other than sex ?
1) he help around the house chores
2) he is provider of the house funds breadwinner
3) he give you advise and emotional support when you have problems
4) he guides you and provide leadership in the marriage
5) he help carry heavy thing for you and he does the repair work when house got problem
6) YOu have kids ? is he a good father figure and help provide for them ?

He has an addiction problem that is for sure. But don't just end the marriage on pretext of sex. There is more than sex in a marriage.

I think both ofyou have to help solve his sexual addiction. religious counselling ? But if he is a good husband other than the sex part than you should also consider those factors.