Accept it for , what it is, and begin to move on. Start by treating yourself, perhaps a manicure and pedicure, maybe a new hairstyle and color, a new outfit and then take yourself out to a fancy restaurant or a local fast food joint and get your favorite dish and dessert and then go home have a nice hot bubble bath with a glass of wine and lie naked like a star fish on a fresh set of sheets on the bed and be thankful you no longer have to share the bed and listen to your ex snore. :D
You are very welcome and I forgot to mention after the bath, dance around your place naked to your favorite song that also helps, plus you can burn off some extra calories from your dinner and dessert.
When I became newly single after my divorce, I planted a garden. Worked off my frustration clearing ground. ;)
I would clean the house anew, and get rid of anything that would remind me of the person that can get thrown away. Even get new bed sheets and other things shared between us
More time at the range.
revamp my wardrobe
That would depend on why the relatioinship ended. If it ends by death, I would never do anything to to disrespect her. We are both in our 60's.
OK, just don't make another mistake on the rebound. Otherwise go for it. You don't owe him/her any loyalty, beyond whatever respect he/she has earned.