I am a single father, and my son thinks I'm keeping his mom from him, he tells me he hates me and no love me

His mom is a dead beat mom, who doesn't even pay child support, and probably owes 7 years worth. he has only seen her a few dozen times in his life, and she always says things to him, upset him towards me and then leaves and doesn't call him or anything. My son really hates me, and truly thinks I'm keeping his mom from him. I am not doing that. He even hits me sometimes and once threw some nachos which were hot on me and slightly burned me. He always says that when he about 12 or 13 and is my size or bigger that he's really going to abuse for abusing him. Its like a mind warp or something. I don't know what to do. He hits me, I don't get support from his mom, I am at my wits end.