You were together all your adult life - you’re not two people anymore, you’re cleaved as one.

And now that’s been severed. It will hurt.

New hobbies and getting your mind off things won’t cut it. If this was a physical injury you wouldn’t recommend someone start a new sport. Your soul is injured.

If the partnership is totally irreconcilable (or if it’s something more tragic, then my condolences) then you just need to accept that and take the time to heal. But is it irreconcilable?

Good luck.