Hi littledancer,
Sorry to hear about your injury, are you sure it is a groin injury (i.e. has a hernia been ruled out)?
If it is a groin injury it should be rehabilitated successfully in all but the most serious injuries, which may require surgery. You didn't say what brings on the symptoms or what the surgery was for on your right hip so I can't really help from a diagnostic point of view, but commonly tendon injuries will respond to rehabilitation whereas a hernia would not. Also a hernia tends to cause pain on coughing and sneezing, or any activities which increase abdominal pressure.
Have you been to see any physiotherapists at all? This would be my first suggestion, particularly if you're sure it's an injury to the tendon. There are lots of techniques that could be used to help this injury, even such a long time after the initial onset. Certainly, I would strongly suggest trying this before considering such a drastic operation.
Please let us know how you get on!
Ruth Cheesley BSc(Hons) MSc MCSP
Chartered Physiotherapist