WTF IS UP WITH MY HAIR? HELP, PLEASE?

Ok so, I'm mixed, Asian/black. My mom has thick hair and a lot of it. and my dad, well he's black so my hair would be, you know. Nappy. So basically i have nappy-ish/thick hair, and A LOT of it. I have the in-styler, and it works to get my hair straightened. ( i straighten my hair once a week) But it wont stay as flat as other people. like, its kinda puffy. So that's why i don't like letting my hair down (i have a low self esteem :/ ). WHAT DO I DO?