<human>: Can you provide a brief overview of the text?

So my girlfriend of 4 months and her best friend are looking to join a sorority (Canadian University if that makes things any different). Her best friend is also in a relationship with someone, but he's in-town. I'm 5 hours away lol. My only issue is when I asked why she wanted to join a sorority she replied with "I don't know." Which didn't sit well with me. I know what the media depicts about sororities can be exaggerated, but with a reply like "I don't know" I'm a bit skeptical as to why she wants to join, and if she does get recruited than I know she'll have to invest a lot of time into the sorority, which means less time talking to me. I am also naturally going to worry at least a bit when she goes to mixers or whatever you call them. Still though, she told me she won't join if it's too much money, and there's a chance she might not even get recruited.
<bot>: Girlfriend wants to join sorority. When I asked why she said "I don't know" ... Should I be concerned ?