I think you'll have the most luck searching for spells under the "Peaceful Home" category. Put "peaceful home spell" into Google and see what comes up. Lucky Mojo has a good online article about peaceful home spellwork You may try sweetening him up with a honey jar spell also.
You asked for magical advice so i'll not give out any unsolicited practical advice except to say that magic works on the love, tenderness, etc. that a person has in their heart to begin with - it will not turn a cold fish into a Cassanova (not that your husband is a cold fish).
At best, a good spell will stir up the potential he has and perhaps then he will decide himself to cultivate tenderness on his own terms. A spell will not make him into something he is not. You said he wasn't much of a family man to begin with - go ahead and try magic, you may get great results - also prepare to live the rest of your life with a partner who shows his love for his family differently than you do. Best of luck!