Weary in well doing

Husband and I got into a bad argument , he asked me for a divorce .... he said that he still loves me , he just don’t know if our life will ever come together because we have been struggling a lot lately .. I trust God , and I know God is a good God and he will keep you in peace if you ask him to . How do I fight for my marriage even if he gets weary , I know that we will be okay . How do I be strong while he’s weak ???