Why does my mom act like such a *****?

I know every teenager thinks her moms a ***** and she just cares about you, but honestly. mines a total *****! i just got a sort-of boyfriend 2 months ago and ive been hanging out with him a lot lately and she gives me flack about it! she barely lets me go over there and when she does she ALWAYS has to talk to the parent. its so annoying! and she took away my phone because i called him early in the morning and STILL hasnt given it back! shes the most unfair parent and i hate her! why cant she get off my back all she does is annoy me and say no all the time! and i know your gonna say its cause she cares and stuff but i really think she just enjoys it when i cant go out and when my lifes miserable which is all the time with her!