So sorry man.
As to your question, it was about 3 years between losing my friend Seamus and getting my baby BreeZ, my 2 boxers. He went everywhere with me even to my job sites and my customers and guys loved him. We ate the same things sometimes. He would eat steak off my fork for crying out loud. He was my bro.
I would have gotten another one within 6 months but circumstances didn't permit. When I got BreeZ, she was a 4-year-old show dog with a much different personality than Seamus, and I just loved her so much, just in a different way.
Let me say it this way. Every being is different and holds different places in our hearts. I mean my ex Melissa is the love of my life, always will be, My ex Chara is my passion and Jo is my BFF. I love them all deeply just in different ways.
My friend from 5 years old til now Amy, was just passionate about her dog Bear. He was, no bullshit, the love of her life. His passing has devasted her even though she knew it was coming. She got her new dog Baily a year before bear passed to ease things. Got no boyfriends and doesn't want one, just wants her Bear back.
My roommate lost his rotty of 15 years and it was so sad to watch her go. But then 2 months later he was so lonely and sad that we took him 3 hours to Maine so he could pick up a beautiful 2-year-old female rotty. And now he's whole again. Still an asshole but whole again.
Like Chevss said everyone is different. You'll know when the time is right. Follow your heart on this one.
Hope that helps man.