I think maybe this is more the issue. I have a feeling the age difference might not be the problem as much as where you are in your relationship.
If the love is there, then perhaps it's companionship that needs work. Be open and honest, let him know that you're lonely. Tell him that you need a date night now and again, then take classes or workshops that you're interested in to make new friends.
The relationship you have with your husband has to be healed before any talk of children IMO.