Girl problems...any suggestions?

So i started text this girl a week ago for the first time. We kind of knew each other but I got her number from a friend (which may have been a bad move but whatever). Because school is over im not going to see her in person again until next year (that is if she comes back which she may not). When we did text she seemed kind of bored at some points but she asked me a few questions (which may have just been to be polite idk). Now its been over a week and we havent talked. Would she have initiated a conversation if she wanted to talk? Because she didn't does that mean shes uninterested? And if i should txt her I have no clue what to say (specifics would be helpful. it just doesnt seem like i know her well enough to say hey whats up. and even if i did i dont see how to sustain a conversation after that. so i feel kinda stuck). I feel like the fact that she has my number and hasnt said anything in a week means shes uninterested but idk. Thanks.