How can understanding the limits of free will help in addressing behaviors like abuse in relationships?

So Trump supporters still being the outrageous claims Trump makes (like 600% price reductions, that the job growth/income growth are at all time highs, or that he's secured $18 trillion from foreign countries in investments)?
Have you ever felt love for someone without wanting to possess them, impress them, or even be with them, just wanting them to exist happily?