I want to move out im 18. opinions?

well to continue i dont like the idea of living on my own but im tired of living with my mother it feels like im not there around family we always yell at eachother and my moms gone so much from the house i practically live on my own. my mother wants me to stay home with her cause im all she got thats left from my dad who died 5 years ago. i feel like im in a cage and never myself. and no i wouldnt be living on my own id live with my freinds family. but i get more of say there and i feel it the right thing to do im a junior about the be a senior but i cant shake the feeling i dont belong with my family i dont fel at home but moving with my friend seems so right so am i crazy? and how would i tell me mom?i mean i love her of course its just time....