The right time will be up to you, you'll know when you are ready. For some people they are ready for a new pet right away and others need a lot more time. After my cat Zasper died I got another cat shortly after. I wasn't trying to replace Zasper, but I needed another cat to love and to love me in return. It helped me a lot, I didn't cry as much and I was finally able to have good memories of Zasper. WHen the kitten would play I would remember Zasper playing. I hope things go well for you and you feel better soon.