I don't want my great aunt to come to my birthday celebration
That isn't very nice. Why don't you want your great aunt to come to your birthday celebration?
Because she's an overbearing person and she only wants to bring up the past.
Your aunt is your family.  You should have them come to your birthday party. They care about you a lot.
Family is the people who love you. She doesn't love me.
I'm sure that isn't true. Family should be welcome to attend your party and not be excluded. Inviting family to your birthday shows that you care and if they care for you they will come.