Is it to soon to get another Cat?

I had to put my kitten to sleep yesterday because he got into some advil and the vet said there wasn't much of a reason to try he was to far gone. I only had him for a week and a half and I loved him more than any cat I've ever had. He was the cat I was looking for, fit my personality perfectly. I cried and cried and cried yesterday and some today. My mom came home and told me that she knows someone who has kittens I could have. But I almost feel like I would be betraying Kirk. But also I want another kitten it feels so lonely around the house now that he's gone. I don't know what to do. I know I will probably never find a cat like Kirk again but I still want to get another. But is it to soon?