So this is hard for me to actually describe but here it goes. I am a 19 year old guy and i feel different than most people. I am quite shy but i am trying to overcome that. I feel like I am faking my interactions with people and simply putting on a mask because deep down I don't really feel anything for anyone. I have never been in a relationship before so I guess that has to deal with it. I just want to know if there is something I can do to change this or is this normal?

You just dont have the right people in your life. When you meet the right people, friend or whatever, then you will have sincere honest feelings with meaning.
They are what is known as a sociopath. They know right from wrong (intellectually), but don't have the same emotions/feelings that most people do.
or you could "just" have a serious long-term depression. I'd seek therapy to work out what's what. especially if you'd like to have a more normal life. you may also need medication if you have a chemical imbalance