Is it normal to still mourn someone 2 months after their passing?

I lost a family member a few months ago, who was in their early 20's. We spent most of our childhood together, and saw eachother on ocassions as we got older. They kinda grew out of me though. When I got the news of them dying I broke down. I felt like I lost my bestfriend and the memories we shared. But I feel as though I'm hurting in a way that people who he may have grown closer to should. I feel like I no longer mattered. But I kinda pushed him away a few years back, due to being hurt that we grew apart, which I regret. I thought I'd see him again eventually but now its too late to make up for my immaturity. Months later I still cry, think of him, and just wish I could've seen him again. I love him alot. He was like a little brother that I learned from. Losing him was a big loss, he was a favorite wherever he went.