Yep i've felt like that!!
The point is sweety you cant always try to do something about it, people see in people what they want or what they dont want to see, expectations are just a little part of all the thoughts they built upon us, Think about it, sometimes they have great expectations and that makes us happy, sometimes they just missunderstand or they just thought of something stupid, i think it happens to all of us and i think we all pretty much do it at some point. cheer up!! who ever expects something from you that is not even close to what you are will only get dissapointed, you might too but i am sure eventually those who get to know you will realize they need to change those expectations.