How can i focus on my life??

okay i dont know why my self esteem is sooo down i mean i know that my parents are divorce and im use too it now but whats making me sad is that i can not get every thing i want no more like coach, hollister, louis vuttion i have to by cheap clothes now im going in my junior year and ppl are not going to see me like they use too and i cant get a job beacuse my mom works alot but the good thing is that i have a car but i have a permit since the law change that you have to wait 6 months to get your lincense and to ride by yourselve or until you turn 18 but thats not until january i just want to move on and go to colldge and focus on SATS AND TAKS soo i can make my own money but its like how can i focus if i have all this drama in my life and i want to suceed in life, please just words of encourgement.