Relationships

Should I ask her what's up?

I was talking to this girl a lot for the past couple months. In the past week or so though I've noticed she's not responding as much/often but we're still close like on each others' private stories. I don't know why she's not responding as much so I was going to ask her if everything is okay. Is this a good idea considering I'll most likely see her in a couple of weeks when school is out?
Should I ask her what's up?
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