A New York woman is heartbroken after her family sided with her cheating ex-partner. Halfpoint - stock.adobe.com DEAR ABBY: I was in a relationship with my daughter’s father for 11 years. From the beginning, he lied, manipulated and cheated. My family was aware of it. When I finally had had enough and left, my family decided to maintain a relationship with him (dinners, parties, camping, holidays). He is not a good person. I poured my heart out to let them know how badly what they were doing was hurting me.  That was six years ago, and they are all still going strong. My family and I have not spoken in five years. My heart is broken. It can never be repaired; the damage is done. I no longer want a relationship with them. My heart still hurts, and I don’t know how to get beyond that pain. Can you help? — SUFFERING IN NEW YORK DEAR SUFFERING: I am sorry for the pain you continue to experience because of your shattered family.…