I'm feeling really down and not sure how to deal with this. My best friend has been with her partner for 10 years on and off. She has 3 children to him and he isn't very nice with her. In the past month they have broken up and he has become aggressive once again. They live in their own home and have done for several years now. About 3 weeks ago I got a call from her crying very upset and scared I drove to her house to find him smashing it up and shouting and swearing at her children. I took the kids out of the house. He then in the middle of the street shouted all sorts of abuse at me. He then text my partner apologising. My partner didn't respond to this. He has now told my best fried and our other friends that I slept with him which isn't true. I have said as much to friends and my partner. I just don't understand why he would say this and I now feel in an awful position. What would you do in this situation?