What does Romans 12:2 mean?!

Here is three different versions of the verse Romans 12:2. This verse happens to be my life verse and it speaks to my heart. What does it mean to not be of the world ? I think many times people are confused by this and choose to just sort of ignore it because it doesn't make sense to them. 

I think the message version is a great translation in a way we can understand it. "Do not conform to the patterns of this world". Does that mean we can't do everything the world does/has? No Facebook, Instagram (gasp!), Cell Phones. Girls can't wear dresses and Boys can't show emotion?Is this what this means? 

No no no no...No! It's means don't blend in. Don't become a fly on the wall. 

Matthew 5 states: "14 “You are the light of the world. A town built on a hill cannot be hidden. 15 Neither do people light a lamp and put it under a bowl. Instead they put it on its stand, and it gives light to everyone in the house. 16 In the same way, let your light shine before others, that they may see your good deeds and glorifyyour Father in heaven." 

Do you understand what you are !!??!? You are meant to stand out. You are meant to be original. You are meant to be YOU ! Don't look at other people and want what they want. Don't listen to horrible music and be "of the world". (**Disclaimer: I don't believe music that isn't strictly Christian is bad to listen to. When cussing, drugs, and sex are brought in is when you need to begin to question what you listen to). Live a positive life that glorifies God. Did you know Jesus actually likes to see you happy? He actually cares how you feel. He doesn't want you to be uptight. He wants you to influence others. He says to be a city on a hill. Kristian Stanfill hits the nail on the head in his song Not Ashamed. It goes "We'll be that city on a hill. Burning brightly. I'll be a light to the world. Shining  Your glory". That's all Jesus wants of us. To represent Him not the World !

Love you guys ! -Sav