I hate my dad's family. Advice Anyone?

Long story short, I love my dad (he's actually my step-dad) to pieces but I hate his family. He raised me from birth and still takes great care of me. He will always be my father, but his family... I pretty much disowned. When my baby brother was born (his only biological child), his family pretty much forgot about me and the older he & I got, the more they forgot about me. The last straw was my senior year when his family didn't acknowledge me when we went to their house. As soon as we closed the door, my mom talked with my dad about it because it was that obvious. It broke my heart for the last time.

When I became an adult, I refused to speak to them ever again. No more heartbreaking! The only time I talk to them, is when my dad hands me the phone (I try not to hurt HIS feelings) and even then, I short talk them. His mom literally just called me a few minutes ago to wish me a Happy Birthday today, and as usual, I just let it ring.

They always treated me like a piece of .... and they have talked so much crap about my family and it has caused me to hate them even more. I don't speak to any one of them and could give two ..... about them. I do feel really bad for ignoring his mom because she was usually really nice to me, but unfortunately she's guilty by association, along with my dad's siblings and their kids because at times, it feels like some of them stood by and watched it happen. I was a child! :(

My Dad is the only person I love!

Am I wrong?

Sincerely,

-Torn </3