Your BMI is excellent -- you need not lose weight. And since you have had the condition for over 3 1/2 years, it is likely that it will not disappear spontaneously.
The absence of itching, tingling, palpable lumps, etc, does not indicate that it is on its way out -- it only means that the condition has stabilized.
Some guys adapt and live with it -- and others seek to deal with it with surgery. If you opt for surgery, then do your homework and find a specialist surgeon who will do the right job for you.
Dr Jacobs