Knee reconstruction surgery?

I had knee reconstruction surgery on my left knee after I broke it 5 times, dislocated it, and tore a tendon playing basketball about 8 months ago. I'm pretty sure it's called ACL. They told me that I could either cover up the scar and it would get darker or I could wear clothes that leave it exposed and it would get lighter? Is this true? I would talk to my doctor but I really pissed her off by not wearin my brace half the time and quitting therepy. I'm 17 and a guy and I'm not so crazy about the big *** purple-reddish scar.