"The pain I feel now is the happiness I had before. That's the deal."
- CS Lewis
It's so hard to lose someone you love, but it's written into the contract from the moment you let them into your heart. I've lost a couple cats now, and when I feel myself getting sad while thinking of them, I allow myself that moment to process, but then am sure to remind myself of how lucky I am to have had something in my life that was so great that it could still make me feel that way, years later. It takes time to get there, but I think it's what they'd want.
My condolences to you, Momo is a true beauty.