There are some harsh truths in this situation that other commenters mentioned and plenty of good advice. IMO the most important one, move on - you seem like a

There are some harsh truths in this situation that other commenters mentioned and plenty of good advice. IMO the most important one, move on - you seem like a very capable person and pretty sure you have great opportunities in front of you. Use this to start a new chapter and you'll be very content that this happened when you look back :)