shattered your story has a sort of happy ending in that you found the strength and courage not to believe them and instead to believe in yourself and to cut them off for your own well being. I know it is not optimal and it hurts but thing of the positive energy and strength within you to be able to do that on your own behalf. I do hope you have found other sources of support.

Só leigheas whatever happens with you and your sister--whether you are able to repair the relationship or you have to cut her off temporarily or permanently--hope you are able to do so for the benefit of your own health.

Are you in therapy? Is there a possibility of bringing your sister to a therapy session or to a support group to help her understand what is going on with you and why her words and lack of support are so hurtful?