These last few days have been very difficult. I lost a dear friend way too soon. She had cancer and went from being basically "ok" to deceased in four days. She deteriorated so quickly that the family didn't even have time to move her into hospice. So, there's that.
At the funeral, I was ambushed by my estranged father. Despite what's happened between us after greeting my sister and brother in law, I turned to greet him, and he literally looked away as if to speak to someone behind him, but there was no one there. I asked my sister why she didn't warn me. She smiled and said sorry? I don't get people.
Then, check this out...
About 10 minutes before the service started, I was seated next to my brother in law, when I leaned in and said, " I'm gonna go stretch my legs. I'll be back in a minute. " I went outside and hit my vape a couple of times. When I went back in , I saw that an older man had taken my seat. I said to my brother in law "what you can't keep my seat for me?"
To which he just stared at me like a deer in the headlights. I got angry, and I walked toward the back of the room. It was then that I decided that I had done everything I wanted to do. I spoke with the family, and I spoke with her husband and said my piece to the departed. I decided it was time to leave.
As I walked toward the front of the row , my sister said , hey , there's a seat right back here, pointing to a seat in the exact middle of the isle, four rows behind where they were seated! I said, "It's alright," and left.
I've been upset about this for days, and I just shouldn't be.
You can't control what other people do or don't. Being p***** off about it only hurts me.
Do you want comfort or recovery answer? Comfort: I'm sorry that happened. It sounds awful and I would also be upset. Family drama at a funeral of a friend is the last place you need it.
Recovery: you let a resentment keep you from your friends funeral and now you are feeling the feelings about it and trying to figure out where to put that. Forgive yourself for being human and letting the emotions take over, and congratulate yourself for just stepping away from an upsetting situation and not making a scene or making it about you, and not drinking. You are doing fine. Recovery is a lot of little things that are progress and behavior that is better than it would have been. You did great 
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I'm so sorry for your loss and all of the drama surrounding it. Neither you nor your friend deserved that.