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Is divorce biblical? Scripture never condones divorce; but God allows it when infidelity or abandonment is involved. If you're divorced, confess your part in that divorce, and seek God's guidance for your future.
What is love? Some might think it's the feeling you have when you're "in love". But those feelings are temporary. True love is an attitude and action. Read I Corinthians 13:4-7 to see how the Bible defines love.
You as a parent need to acknowledge that you cannot control your adult children, but you can influence them in a positive way.
When a guy says, "I don't love her any more", it usually means he's lost that euphoric feel of being "in love" when he first got married. Love isn't a feeling, it's an attitude and an action.
Money can be a big contributor to conflict in marriage; but the biggest problem is a poor relationship.