My dad is your age, left my stepmom and is now living with someone else 3,000 miles away.
My stepmom, I've stayed in touch with, my dad, meh, we've had a strained relationship dating back to my teens.

Of course my stepmom feels burned and betrayed, yet, starting her life over has brought about an energy about her that I'm in awe of watching. She's spending time with her girlfriends, remodeling her new home. Had even met someone, although I'm unsure how that stands now.

It's possible. Just work on yourself right now is my advice. Decisions don't occur overnight anyways.