Girlfriend going away for 3 weeks?

My girlfriend asked if I would be mad if she went on a trip with some friends for 3 weeks in the future. I replied with you can do what you want. That said, I won't be mad, but to me that certainly raises concern. We have been dating for a few months now and things have been going well and it has been a slower progression than most people would have. Im not really sure why she even asked that since I figure she would just go anyway. Does that resemble how she views the relationship? Wouldn't any guy be bothered by that? I was thinking of telling her I'll just go on my own trip for 2 weeks with a group of people around the same time which I really would do. I plan to wait to see if she brings it up in person before I mention anything about it either way.
Girlfriend going away for 3 weeks?
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