I'm jealous of my stepmom?

I'm 17 & my dad got remarried 2 years ago. My stepmom is mean. I haven't talked to my dad for a year because of his wife. I'm extremely jealous & hurt because my dad picked her over me. He buys her clothes & nice things. I'm his daughter & my dad said he hated me & disowned me on the phone. I haven't talked to him since. My stepmom controls my dad I'm jelaous & hurt. I feel worthless & no reason to live anymore. That b*tch took everything I had away.