Why do women constantly take advantage of me?

DEAR DEIDRE: I have no problem meeting women but most of them end up taking advantage of me.

I really want to have a steady relationship with someone but if I show a woman even a little bit of kindness, they use it to walk all over me.

I’m a 32-year-old man. The relationships usually start off well because I’m generous and kind. I usually pay for dinners and buy nice presents for the woman I’m dating as I think it’s the right thing to do.

This has backfired on me...