I dont want much contact with my parents

They traumatised me And until they take responsability Or get therapy for that , I wish to move on. They convinetly dont remember anything they did or put me through as an child or teenager. I love both of my parents with all my heart and I still buy them things out of my stripper earnings , but I want them to finally get professinal help , I dont want them to be pain for the rest of their lifes. By the way I have to see my mum occasionlly because I have two sisters , but one is 8 and the other One is 15 and Im making sure shes happy and doesnt suffer like I did or worst , Shes one of my best friends , I take her out places and I stepped in when nobody would do anything for her 15th birthday , I need to make sure she doesnt miss out on being an teeanger like I did , its been harder to take my sister places due to being busy with work but I hope to take her somewhere again soon. But its my sisters to why Im still in contact , my dad because I had to live with him otherwise I would have completely moved on by now. Well I cant say For sure but Ive grown very very apart from my parents although I can tell them everything that happens at work , which is odd , I still dont feel close to them.