<human>: Hi /r/relationships, so my girlfriend and I have been going out for about a year now. Our relationship has been pretty good for the most part, we rarely get in fights, and love each other's company.

Yesterday just caught me off guard though. We hung out, we cooked a nice meal then I suggested we should go for a walk through the nearby forest (something we do pretty often). She was happy as can be. As we started walking, I noticed she became increasingly distant for an unexplainable reason. Wouldn't respond to my questions, one word answers, just seemed closed off.

Then it was about 8:30pm, she asked if I could just drop her off at her bus stop. Which was unusual for her--she usually sticks around late into the night. *Okaaaaay I guess...* so I dropped her off as she requested.

I texted her an hour later asking if she got home okay and if everything was alright. She read it, but no response...until 2 hours later she said, "Yeah...I think I just need a bit of a break."

I texted her goodnight, and haven't texted her since. But I am completely *baffled*. What does this even mean? Went from completely chipper and normal to "I need a break" in one night. I am worried if there's something going on with her. Should I give her a call?

Can you condense the text into a few key points?
<bot>: Girlfriend suddenly, almost unexplainably became distant and texted me "I need a bit of a break." What does it mean / what do I do?