I lost my sister in December 2014 after a heartbreaking decline in her health battles with heart disease and alcoholism - she was 57.  I feel as though I lost her twice - when she began her mental spiral a few years ago and then physically. It was also exacerbated by abuse from a codependent person in her life.   I've never been part of a support group and am not sure what to do here, or how much or little to share, or really how I this can help me or others.  I just know that I could use a…