It sounds like you two are very close. She is lucky to have you as a sister. A lot of what you said was mirrored in my own family. My big sister is still my hero. My adoptive parents did not know how to provide the emotional support we so desperately needed. We were 3 biological sisters adopted into the same family. Me and my hero are both in counseling and the other sister has no contact with anyone in the family and I do not blame her. There is a really good section on self esteem at the bottom of these forums as well. Keep posting.