How do i break up with my gf? Should I ? Every time i sit with her anywhere (lunch, homeroom) she never talks!?

Everyone says that we " don't talk much". we've only been going out for like a week! what should i do? its always really awkward and if i try to start a conversation, she answers in 1 word responses! What should i do? we haven't even been on a date yet. i am in 8th grade and she is in 7th. just for information. Please help?