I'm sorry to hear that you're not getting the intimacy that you need in your relationship and that your husband won't do anything to help solve the problem. I imagine that it's a lonely situation for you. It's okay to leave. You don't owe it to your kids to stay with their dad. A parent owes their kids being civil to the other parent and parenting cooperatively with them (as long as the other parent isn't abusive or something like that) but that's it. If you stay with him, they may eventually pick up on the unhappiness in the relationship, think that being unhappy in a relationship is normal, and stay in unhappy relationships themselves in the future.