Friends who refuse to change
Friendship is a two way street. That means to be a friend both have to do the calling and the plan making. Of course people get busy and of course friends argue now and then. What if your friend refuses to change?
If your friend refuses to change and you tell her how you feel that is not the friend for you. Yes, you should work on you if things need to be done but if she is not putting in her side of the deal she is not a friend.
If you put in all of the work and get nothing out of it, then you will become stressed out. Yes, you think of the good times you shared but if you are getting stressed out and she does not care then she is not worth it.
Remember the good times that you had with this friend and look for new friends. Look for someone who appreciates you.