Friend troubles :/

So I've been best friends with this girl for a really long time. But It's kinda a one sided thing meaning I feel as tho she is my best friend but, I am not her best friend. Which is fine. Any way lately i have felt anger and heart break towards her because she makes me feel less than her, and she always has done this. I wanna stay friends with her because she's my stoner bud. But I do t want to stay friends because she's often to mature and judgmental for the age group.. Anyway! What should I do?