Why do I have such a ungrateful sister??

awww sweetie i'm sorry. Your sister is being a coward. I'm sorry, but there are all kinds of people in this world. Some good, some bad. Some caring , and some selfish. Your sister is selfish. I'm sorry to hear this. Maybe you should talk to her. Tell her how you feel. Tell her you would like to have her support during this difficult time. If she still chooses to neglect you, you're better off without her. I'm sure a person like you have lots of friends who care and love you. If your sister ignores you, you can turn to a close friend for help and comfort.