The biggest problem with this injury is when it becomes longterm... all of your surrounding muscle groups begin to start working overtime. Which means that your adductors, hamstrings, and hip flexors cannot be synergetic. One of those areas will always be tight. And if you do have a RA tear or otherwise, you have a constant pulling.
Can you heal without surgery? If you don't have a tear, I'm sure it is possible. But for people who have longterm issues, I don't think it is likely. I also think that many people will not heal without manual therapy... Mike Boyle states something similar in one of his articles. Many of us have soft tissue problems in the groin and surrounding muscles groups preventing full function. I have learned this through A.R.T. treatment. The website is posted below.http://www.activerelease.com/
If you want to get better, you need a plan. If you don't have a rehab protocol, your improvement will be minimal at best. With A.R.T., I have discovered weaknesses that I didn't even know existed. Additionally, I have learned a lot of exercises that I wouldn't have otherwise known. These guys are professionals. Since my surgery, I am a lot better. I can't run yet, but I think it will come once I strengthen all the necessary areas.