Easy... put up with c**p when you should stand up to it.
A lot of men think that by tolerating abuse, they are winning friends and influencing people. In fact, they are earning contempt as pushovers. Women don't respect them, especially in a dating context, because they foresee the man not being a good protector/provider.
The alternative is to be kind, in a Christlike way. Kindness is a fruit of the Holy Spirit. "Nice" isn't.