<human>: To start off, yes I know I still live at home and that I'm not as "grown-up" as other individuals, and I in no way intend to sound like a whiny brat with separation issues but hear me out:

My mother will still tell me to do things like "Make sure you do your homework" when I clearly have had no problems doing my homework in the past. We will be eating at a restaurant and when I order she will interrupt me and say things like "Oh I don't know if you'll like that." My sister (21) notices it lots and gives my mom dissaproving looks and tells her I'm "clearly old enough." 

It gets the the point where my mom will make up arbitrary rules like telling me my girlfriend of two years can't stay over, yet my sister and her boyfriend of 6 months are always welcome to stay over. There is a clear double standard between me and my sister; It's very transparent and my mother is oblivious to this.

Please don't elaborate on why my mother is acting like this. I know it's because I'm the last child left and this sort of thing happens to all the youngest siblings. I love my mom to death but this behavior is beginning to make me resent my mother. 

My questions for you is: How can I get away from this babying? How have others dealt with it? How can I gain more responsibility? How can I show my mom she is being overbearing?

Can you provide a brief overview of the text?
<bot>: Mature enough to think, act, and speak for myself yet my mother treats me to the contrary. How can I fix this?