“I’M from the U.K & l’ve just finished school here. I have the option to stay & asdfadsf ”

I'M from the U.K & l've just finished school here. I have the option to stay & work but I don't know If its the right thing to do? i don't have any family apart form my brother , in spain & my sister & niece in the u.K should i try to make a life have??