I'm so sorry you're injured

I know it sucks. Being injured is such a blow because so many people count on exercise not only as a calorie burn but also as stress relief and to give their day some structure and a sense of accomplishment. I know with the adductor it's a bit different because it limits your choices in crosstraining, so it's hard to think about having to replace all of that for a couple of weeks, but losing weight is totally doable without exercise.
During my last injury one thing that helped me was to really focus on my eating, as
LoriBell said. Rest it
as much as you can for the next couple of weeks. I can't emphasize this enough. I know it's tempting to try it out to see if it's better yet, but it's
really important that you give it the chance to heal completely or you can be struggling with it for months vs. weeks. 2 weeks of complete rest will do more good than a month of partial rest.
It also doesn't necessarily mean that you'll lose muscle mass during those weeks, especially if you're the type who exercises daily. Sometimes a rest is a good thing. It will give your body time to heal not only the injured muscle but completely repair the muscles that get sore from day to day so that you can come back feeling refreshed and motivated. It's not fun to lose the little extra boost that burning extra calories can give you, but you can plan around that and make up for it in other ways. Really.
I was out for a week and a half this last time, but it actually upped my weight loss and made me faster and better at what I do. Maybe instead of a setback you can view it as an opportunity to really hone in on your diet and what you want to accomplish in the coming year?
But I know it's hard. Just don't get discouraged or use it as an excuse to give up on your plan. Sometimes things happen and you've got to roll with the punches. Hang in there
ETA: 71 lbs, that is incredible and shows a huge amount of determination! Good job!