Should a 21 year old, college graduate be afforded the opportunity to make her own decisions?

I recently graduated from a 4 year University, in 3.5 years. I have a teaching license, but being a December grad, it is difficult to get a job. So, I am back at home substitute teaching. I would move out, but I do not have the means to logically support myself. With all of this being said, I am having the hardest time getting through to my parents about my ability to handle myself as an adult. I am scolded when I mention that i am going to visit a friend. As a 21 year old, I feel that is more than enough to tell where I am going. I souldn’t have to ask permission, should I? I do have a boyfriend, and now that I have graduated, we have to work with a long distance relationship. They have stated that at this age, I should have nothing more than a best friend. This is very unrealistic, to me, because they both had relationships at my age. My mother was actually married, already. I am completely aware of parents wanting the best for their, but I am fed up with being smothered. I feel that my parents take advantage of my not being financially stable enough to move out. It is like they rub it in my face with the things that they do and say. Am I wrong for feeling this way, or is it just something that I should understand at my young age?