Hair HELP!!!!

Aleesha
Ok ladies I have been desperately trying to grow my hair long for a long time now. I have super thin fine hair that seems to break off. It grows it just won't go anywhere in length because I have naturally curly hair and I hate it so I use my straight iron everyday so I'm just breaking it off instead of it actually growing I am also noticing its thinning even more by straightening it everyday. Any advice on what to use? Or can anyone help me? I've tried everything.