welcome moonbeam2 to pc. i think you're correct in being concerned. first off you need to contact your doc for a schedule to use to rid yourself of this dependacy to oxy's. withdrawal can cause serious results. i'd not try to do it alone. you need medical support. and yes in my opinion you have built up a tolerance of oxy's and it will only get worse if u don't seek help.
secondly your friend may be your friend but this giving you the oxy's is not friendship.
thirdly call your dentist to get your tooth fixed. if you need pain pills after take as few as you can. otherwise you're at risk due to your drug useage.
forth narcotics anonymous, NA, can help too.
Membership and organization
The only requirement for membership is "a desire to stop using," and members "meet regularly to help each other stay clean," where "clean" is defined as complete abstinence from all mood and mind altering substances (including alcohol and marijuana).[4] Membership in NA is free, and there are no dues or fees.
The foundation of the Narcotics Anonymous program is the twelve steps and twelve traditions.[5]
The nature of addiction
NA describes addiction as a progressive disease with no known cure, which affects every area of an addict's life: physical, mental, emotional, and spiritual. NA suggests that the disease of addiction can be arrested, and recovery is possible through the NA twelve-step program. The steps never mention drugs or drug use, rather they refer only to addiction, to indicate that addicts have a disease of which drug use is one symptom.
http://en.wikipedia.org/wiki/Narcotics_Anonymous
you can pm me if you wish. i hope my info is helpful to you.