Should I Break up With my Girlfriend?

I really really like her, but she's very high maintenance and texts me all the time. I've just realized this, but she keeps me up almost half of the time. I'll usually go to the hospital(She works there) when I'm finished with school which is around 6:00-6:30, and I'll leave at maybe 8:00, we'll usually come over to each others homes on Fridays and Saturdays, and sleep there. When i'm not with her she gets kinda sluggish and sulks for a while. After I leave we'll usually text and call each right after I get home, the thing is its really bad for me since I go to school, I usually only get 4 hours of sleep and go to school for the whole day. She doesn't go to college and is helping her mother with her hospital(take his money starts playing). Anyways I also think this relationship is bad for her since she's a bit too obsessive, there are many times where she's been really clingy when I go out with my friends and usually comes with. She's on really bad terms with one of my really good friends because "I spend too much time with her" anyways I've been thinking about telling her that I want to take a break, but at the same time I don't want to.