This is something I am dealing with, but it is my mom instead of my dad. Honestly, I do not think there is much you can do except for being happy. In the end, parents just want their kids to be happy, and to live a life without regrets or sadness. My mom is willing to suffer in order for me to be happy, and the only way to make it better is to be happy, because it will let them know that this is the right path.