Am I Acting?

After reading Goffman's the Presentation of Self in Everyday Life I really started to think about how I act in my everyday life. Am I always acting, or are there times where I am completely natural to my inner self. I think about most social situations I am put in. When I am at work I am a "sales person" do I really care about helping people find an outfit, no not really but I act enthusiastic and happy when really I am thinking how long until my next break. At university I sit and listen to others opinions and politely nod and smile when sometimes I just want to tell them how wrong they are. When I am with certain friends I have to refrain from saying certain things or behaving in a certain way. When I am with my grandparents I try my best to refrain from using profanities. After this succession of thoughts I thought how exhausting. I am without realizing it constantly acting, I am always in a certain role. Fulfilling the characteristics of whatever I am doing. I am a daughter, a friend, a student, an employee and so on, I embody all aspects and I am expected to do so. For my life to maintain an ordinary structure I must act appropriate depending on what context I am in.