How can I get rid of this scar on my elbow? (photo)

So I fell pretty hard on the sidewalk and as a result, I got a pretty big scar on my elbow. I've been told to apply cocoa butter on it, but I am not seeing any results. I have had this scar since November 2013. I am a young female and I wear a lot of long-sleeve shirts because I am embarrassed by the scar. Sometimes it hurts when something rubs against it and it also itches occasionally. Please if anyone can help me come up with an alternative to get rid of the scar, that would be great!