Everyone has periods in their lives when they need to be alone. Bruce had his. And then Terry came along. And I say again, he will marry, even if it is late in life. And his family will be his joy and terror to his dying day, and they will surround him and grant him peace. And he will know, even if the battle will never be won, it will never stop being fought, and for the right reasons.
(In this universe, maybe Babs and not Selina. Maybe.)