'Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver'
This verse is a key to many, many modern Christian issues.
It means, every person should give when they have decided that they want to give. Because God loves a cheerful giver.
I ask, what point is there in you giving, and giving, and giving, under compulsion, to a man who seems to not care?
When you could give to God who loves you with all His heart.
I feel your pain so much because it is the hardest thing in the world to let go of someone whom you love. God wants a strong companion for you.
It may be your husband, it may not. But letting go of attachment to an outcome and simply acting in love, is the key to this.
Do you have kids? If so, concentrate on them. They are your focus.
Remember, all will be renewed in the end. You shall have your companionship. To one who loves you more than you can ever imagine.