Is she texting me out of boredom?

So this girl and I started talking but I'm having trouble telling if she's interested or playing games or just being friendly. She never initiates contact. When I contact her she seems generally happy to talk to me and when we text she's usually very prompt with her responses and in no way ever seems to be ignoring me and when she has to go or is busy I get a ttyl and she'll typically pick up the conversation and hour or two later. So she has plenty of opportunity to blow me off if she doesn't like me but she never does. Can someone give me some insight into her behavior?
Is she texting me out of boredom?
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