You're 26 years old. You should know by now that sometimes, people CHOOSE not to be close to another person.
Just because you want to be close to your sister, doesn't mean she wants to be close to you. And it's well within her right to not want anything to do with you, or have the situation remain the way it is.
This is a spell of control and selfishness. No where in here does it express your concern for her, her feelings, her wants or needs.
If this is how needy and demanding you are when you do see her, I can understand why you two aren't close.