not accepted

Kay
I'm sixteen. I'm bisexual. I haven't come out to my family yet. I had a conversation with my brother this morning...
He said a tv show was gay (it was a kids cartoon he watches all the time), and I said there's nothing wrong with that. He then went into saying why he thinks it is wrong. I asked him what he would do if I liked girls. He flat out told me he would never speak to me again. 
He later asked me if I'm a lesbian. I told him no. He asked if I was lying, and I again said no. He told me "You better not be a lesbian." 
He then proceeded to call my 9 year old brother a faggot the rest of the day, and I told him to stop, and he said "make me." There was nothing I could do because my mother is sick and my stepdad isn't home. 
How do I handle the fact that my little brother hates the real me?