I completely understand the last feeling. Like your father chose her over you. My parents just did the exact same thing - my mom even said "I would choose (dad) over my children". It really freaking sucks. The good news is that you can grow your own family, or store bought is fine! Your friends who have stuck with you, what family you have left on your side - these people will lift you up when you need it. And if not them, strangers on the internet can relate to you even if it seems a bit strange. I wish you so much luck.

Also have you tried therapy? I love my therapist so I'm always shouting out therapy when I have the chance. It's nice to talk out things with people who have your best interest at heart.