A real life Evil stepmother!!!!?

my stepmom hates me for no reason! when I was little we got along great...I lived with my dad and brother and she was dating my dad and had a son my brothers age...we were always playing and having together...then I moved to my moms and came back for my freshman year in HS and now she hates me. She tries to act nice in front of other people but she's a bit*ch when it's just us. For example: my dad hates my bf and doesnt want me to go out with him so one day my stepmom said she is going to take my little brothers (the kids they had together) to see a movie and I asked if she could also take me and my friend and she said yes..but when we got in the car she said, "would you rather pick up your boyfriend so you can spend time together outside of school?" and for the first time I thought she was actually being nice..so I said yes...when we finally got home my dad asks how the movie was and blah blah blah and my stepmom says, "it was okay, ashleigh and brian liked it."