Time for unmarried dad to focus on his kids

You seem to imagine that as long as you are getting what you want, the other people in your life will be fine. This scenario really only works out for you. You aren't sad over the breakup of this relationship because you already have another girlfriend.

My feedback for you is to put your children first. Every single choice you make should be made with their best interests as your first priority. When you truly choose to see the world through their eyes, your own life will come into focus.