How would you deal with your dad not caring?

So my dad has never really been there for me when i was little. He used to hit my mum and went for nights on end with other women. My mum used to be really hurt and now i dont see my dad. We had a massive argument. My dad is a social path. He calls me fat, ugly. Not sounding big headed but i know im not either of those. Either way it hurts me just the same. Me and my mum are really close, shes my best friend. my dad doesnt support his kids, he doesnt care, he doesnt try. But i love him because hes my dad. and i just dont know how to deal with all the stuff he says to me. im a very sensitive person and take things to heart. Like i said i dont see him anymore because he doesnt want anything to do with his kids. hes a very very wealthy, cold man. He says he wants me and my mum to die and says really horrible things. they really hurt when he says them. i would tell my mum about how i feel but my mum creates a barrier and she just hugs me, says she loves me and says i shouldnt speak to him. i know i shouldnt and ive been hurt so many times by him but its hard. I just want to know some strategies so try and create a barrier, or become stronger. Im only 16 and finding it hard to deal with, especially when my character of person who is someone thats bubbly, cheerful and open to everyone but this is just too much and gets me down. i would speak to my friends but its hard :/ x