hashemsprincess- was the comment said respectfully to you or was it said nasty?
My opinion- if it was said respectfully obviously your friend values your friendship and wants to just point something out that you did wrong so you can fix it. If it was me i would be grateful that my flaw was pointed out though it might be uncomfortable but in the long run its worth it. Trust me, its not easy for a friend to point out your flaw to you in your face. Its better then being silent about it and letting it fester.