Please Help- A New Hairstyle?

Just to warn you this might sound a little emotional (sorry) but not im not in the best mood (you'll read why) but thanks to all those who will cont. to read this and reply! Anyways, I am sick and tired of putting my hair up in a ponytail EVERYDAY and my parents keep on telling me to change my hairstyle because they are also tired of it. Easier said than done. I have thick long hair (long as in shoulder blade length) and to be honest I have never had a hair cut that I loved. I have been to a handful of stylist and all of them say that my hair is so thick and when they try and style my hair it FAILS... I've been ok with this for a couple of years. I cared about it but not so much (I would just put my hair up in a ponytail) I've tried just letting my hair down and straightening it but there is so much hair and my hair is dull and kinda frizzy that even straighten my hair failed. Today, I tried straightening my hair (divided my hair up and straightened small sections) but my hair was still dull, lilttle frizzy, and NOT straight. (It was kind of straight but the ends weren't- probably because I need to get my haircut soon) I guess the mistake I made was keeping it down and changing my hairstyle a little. Well that was a bad choice. People at school either stared, or turned away and barely spoke to me (even people I know) and one guy even told me that I looked really weird (I kind of know him, but I don't know him really well) Well because of all this, I'm done. I want to change. I want a new style (currently in style) that will work for me. Any products that will help? Any Advice? Anything. I guess some other info is that my face is oval shape (i think) but I have a small face (and small body -5' 2.) Again thanks for dealing with me And THANK YOU SOOOOO MUCH TO all WHO REPLY!!! :)