Ayee:
Your therapist is, of course, right. It is normal that you should feel like this. Anniversaries, birthdays and important dates are bound to bring memories of loved ones and remind us they are no longer around. I am sorry you are going through this hard time, and equally I am very glad you have a good therapist, who is helping you along.
I am sorry your aunt is so ill, and I can understand how very difficult it must be for you to witness. You are quite entitled to tell your family that you are unable to deal with these matters, that you do not feel up to it, and I am assuming that as adults they are capable of dealing with arrangements themselves.
Sometimes friends and other people do not fully understand the grieving process, and perhaps you could explain to them, rather firmly, that you cannot feel any other way just now.
Take care of you,
Seven