This is my first blog entry. DH and I have been together almost 20 years.  We have one teenage BS together and I have 3 SSs and one SD, late 20s to mid 30s. SD30 is here visiting and it is awkward as ever. I just don't know how to let go of the resentment I still feel. Long story short, BM is diagnosed BPD and was high conflict for years. SD came to live with us in high school but hated every minute.