Girls, Does it mean anything if a girl takes forever to respond to me?

OK so my girlfriend and I are always busy and only get to text each other at night. Lately however I've noticed that shell take longer to respond than usual. She tells me she's watching Netflix. She'll send me a text and I'll respond within seconds and then it'll take her like 10 to 15 minutes to respond. Does this mean anything? Am I boring her?
Girls, Does it mean anything if a girl takes forever to respond to me?
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