I actually have to agree with this. A lot of the people I've been with assume that because I'm shy and act overly kind torwards them, they view me as this sweet, perfect little angel. They know this because they've only been used to seeing that side of me. But trust me, I don't always act that way 100%. I can be pretty immature at times too, it's just that other people are so used to seeing me act good and being content with myself, that I start to feel somewhat pressured of ever showing them how I truly act like. They never believe that someone like me could ever swear, lose my temper, act gross, ect.
Whether they like it or not, I'm still human. I do tend to mess up and I do tend to lose control of myself when I become depressed/angry. I can swear a lot, throw things, scream, make up corny immature jokes, burp, eat like a pig, ect. But it still just goes to show that I'm not as perfect as people seem to think I am. In fact, I actually do get tired of having to watch what I say/do because other people aren't able to tolerate it. It's like I have to always remain content around whoever I'm with, even if there's something that truly gets me riled up. I feel that the only place I'm ever allowed to express my true self is when I'm at home alone. At least I don't feel the pressure to keep my feelings and emotions bottled inside. It's stressful for me to have to keep putting on a front and act pleasant all the time around people, especially the one's I don't like. :/