How to stop comparing my grief experience to others?

It’s been exactly a year since my wonderful dad died. The memories of him making me a lot more sad than happy. I can hardly watch basketball sometimes, because that was our thing. It’s been too hard to visit his grave. I isolate myself from friends for periods at a time.

And then I see other acquaintances who have also lost their dad (ironically around the same time as I did), and yet they are able to think of the memories in a happy way. They go out with friends and post a lot on Instagram. All smiles. Then, I feel like something is wrong with me for not being able to reach this stage yet.

I’m able to function (eat, go to school and work), but I also get quite a lot depressive episodes that last for weeks. The sadness, however, is always there.