I think my daughter reads too much?

I think my daughter reads too much. We got her a Kindle for her birthday a year ago and she fell in love with the thing. She doesn't let it out of her sight and she takes it with her everywhere. She reads in the car on the way to school, she reads while she walks between classes and during lunchtime. She reads stays up reading books late into the night after she's done with her homework. She reads for 6 or 7 hours on Saturday. She reads 6 or 7 hours a day every day in the summer. During the summer she sits outside under a tree and just reads all day. She takes her Kindle when we go on vacation and sits on the beach and reads all day. She only has 2 friends and she has has never had a boyfriend. Should I just leave her alone? She says she's not depressed, she just really loves books. Sometimes she reads while she walks because she loves the book so much. I don't think she's normal. Is she?

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