Gordie, if you are a Christian I defy you to say your marriage is loveless. In a certain way, your love is greater than than it ever was when it was returned. It is easy to love when you are loved back. What you are doing now is perhaps a truer love. Your love is only enabled by something divine in you because your fleshly self could never love her now. Don't listen to the lies of the enemy in your head telling you about those future possibilities, there may be an outcome you can't imagine, and God already knows what it is. Keep being patient. Did you ever read The Hobbit? I am thinking of them in the dark forest not realizing they were near the end, and doing something that prolonged their time in the darkness for a long while because they lost faith. You don't know the end of this story, your mind does not need to go there right now. You are not at the end of your rope yet, so just be where you are and don't let those lies loom up in front of you and offer you despair. You are in the light even if only God can see you walking in it and surrounded by darkness. We can see it too.
I believe I will see the bounty of the Lord in the land of the living. Wait for the Lord with courage. Be stouthearted, and wait for the Lord.