Hi myhearthurts: sorry that it does.
A common theme that you will find in these addiction threads is to tell the truth. As hard as it is, start with your doctor, or better yet, invite your boyfriend to the doctor's office, and tell on yourself. Most pain management docs know about addiction and tolerance and can explain it to your bf better than you can.
The longer that you are on these meds, the more you will need (you know about tolerance). And you are definitely showing the warning signs of addiction. With your back the way it is, opiates may have to be used (can you tell us what is going on in there, please?). Methadone, as bad as it is, is often used for long term pain management and addiction problems. Your doctor can help you make that decision. Oxycodone is SO bad for addicts, imho.
God bless and stay strong,