<human>: Could you distill the essence of the text into 1-3 sentences?

I don't plan on breaking up with her and I plan on stay by her side so please don't recommend that.

To start off with this is a throw away for obvious reasons. I'm 25M and my fiancee is 23F, back in 2013 i got injured in the oil field and lost majority function of my left leg and have been on medication since. My fiancee got hit by a drunk driver in 2014 and had to have surgery to put a titanium rod into her leg as it was shattered. She hasn't fully recovered yet as she still has pain. 

Backstory: We have been together for eight years and our relationship other than this issue has been great. We bond well, have great conversations and have raised our dogs to be amazing. But about a year and a half ago i started noticing my pain medication diminishing and there was random excedrin pills in the bottle, i questioned her and she lied about it to cover her tracks. 

Finally it all came to a halt and i told her it was our family or the addiction, and she choose us. She has been saying she is depressed and we just got her an appointment for a behavior health doctor, so i know we're on the right track. She relapsed four days ago and feels terrible about it, which has put her in deeper depression. 

I'm having surgery tomorrow and it's a bit major, my doctor tells me i most likely will not be walking for up to a year. She's being very supportive, I guess i just want to know if i'm doing the right thing. I love her and i know she loves me, this is the only issue with our relationship and i would like advice, Thank you.
<bot>: My fiancee of eight years has been caught stealing my medication and wants to change, am i doing the right thing by staying?