"masks"

In class today one topic that interested me the most was the discussion about the different masks that we put on in life. After class the topic kept running through my mind and I decided to make notes of the different "masks" that I put on during the day. Through out class I had the "mask" of a student. I was sitting in a learning environment, with peers and my professor..I could obviously not talk about what I want to do Friday night....or how I want to go shopping for Friday night or things that have happened recently at home or with my friends.
After class ended I met up with a friend for lunch. And I noticed I had a different "mask" on. She was telling me about her troubles with her boyfriend and how she is looking forward to Friday night to finally party. When she was telling me about her boyfriend I was comforting her and then cheered her up to look forward for Friday and that I need to go shopping and how that all summer because I have been living at home I havent been able to have any fun.
After lunch I had to call my work place to find out when Im working. I realized that even when just on the phone with colleagues and my boss I had a different mask on. I was completely serious, and wanted to sound hardworking in the sense by showing interest in my job by sounding content with my LONG hours..all weekend.
Then when I got home and talked to my mom, I realized I was completely different than I was any other time of the day. I complained about my long day, the traffic, and how hungry I am. I became completely like a child, dependant on my mom for everything.
These are just some of the "masks" that I put on during 1 day. There are many different masks that I may put on as I go through this week. Dealing with different people, different situations will force me to react and behave differently and those I beleive will be the different "masks" that I put on.
However I wonder, what is the real me then? Is "me" a combination of these masks or am I just one of these masks and the other times I am fake?