Hey wannabehotguy,
I can relate to your situation. I am 21 & my father is bi-polar, he has exreme mood swings all the time. It's strange b/c he & I always got along so well when I was young (I am 1 out of 6 children - 3 girls, 3 boys - & the youngest girl) but when I was early into my teens he started in on me bad. He would get mad at the littlest things & start screaming & yelling at me. He thought that I was into smoking, drinking, drugs & all that stuff (which I was not at all!) & thought that I was out of control. When I was 16, he made me see a few different shrinks b/c he thought I was the one with the problem. He tried to convince me that I was bi-polar, too!!
The last straw happened the night before my sister's graduation party when I was 17... she & I were fighting over a sweater. She ran up to our room with me right behind her, she slammed the door shut so I started banging on it to let me in. All of a sudden, my father ran from his room across the hall, grabbed me by the neck & shoved me against the wall & started to lift me up! I didn't know what to do, I was scared that he was gonna choke me so I started screaming. Luckily, my sister came out of the room b/c she heard me screaming, saw what he was doing & started crying - that is when he let me go. But nothing was EVER said about it again, not by him (he has never appliogized to this day) or anyone in the family & I just had to go on as if nothing happened.
That was the last straw for me! There was no way that I was going to stay in the same house as him, so I moved into my b/f's house (we had been together since we were 16 & still are now

!). He was the one who was always there for me when times got bad. He saw a lot of the f**ked up stuff that I went thru with my dad & he was always there to help me thru!
My parents ended up getting a divorce & when he left the house, I moved back so I could help out my mom with my younger brothers (she worked nights so I would stay there with them at night). It worked out good tho, b/c I had my daughter when I was 18 so in turn, she helped me & my b/f out with that.
I don't talk to my father & haven't for a LONG time. I honestly don't know if I ever will or not, but don't plan on it & don't worry about it. He put a damper on my life for a long time & I don't need that. I especially don't want to worry about how the way he acts or whatever is going to affect my 23 month old daughter. She is the best thing that has ever happened to me (other than my wonderful b/f) & I am all set with his trying to ruin it for me!
I know what you mean about trying to seek his approval - I did that for a LONG time. I was so confused by the whole thing for a long time, I didn't understand why out of 6 children he felt the need to take all his anger out on me. What did I ever do that was so terrible to him that would make him feel that way towards me, his own daughter?? Well, now I know the answer is NOTHING, I didn't DO ANYTHING! It was HIM that had a chemical imbalance & it was HIS responsibility to see someone & find out what he could do to control it & his temper!
Sorry that I don't have much advice to give you, but I just wanted you to know that you are not alone! If you are living on your own, why do put up with his ****?? Why don't you try telling him that if he doesn't stop treating you this way & start showing you some respect that you don't have a need for him to be in your life, especially like this!! You are so much better than that & don't deserve to be treated in that way... you deserve respect!!
Good luck & if you ever need someone to talk to, I (& many others) are here!