The author may be unduly harsh on her father. He got to be publicly married and have a private gay life. He didn't have to live with his wife much. He liked the idea of having a daughter.

Given the hand he was dealt it's a pretty good outcome for himself. Grossly selfish, but not a waste for himself.

Some don’t fully understand that the universe does not owe you any camaraderie in your affairs. Not even a small mouse to talk to. Many live the same paths we live entirely alone. While life took from her a real romance, it did not take from her partnership. Friends along your travels is not guaranteed, neither are best friends, or the bestest of best friends. Make do, seriously.