It's no bother, you've got something on your mind and there's never a wrong time to wish to speak about it.

Though I wish I had better advice for you, I would be handling your situation the same way you are. There isn't much you can do unfortunately. At least it sounds like. I am no expert, but all friendships go through ups and downs.  The older you get, the more things change. Everyone handles it differently. I think as long as your friends know you are there for them and you continue to be available, they'll eventually recognize you as who they need.

Have you directly asked anyone what happened, if it was something specific? I'm sorry you're going through this, but you'll figure it out. I know you will.