<human>: Summarize the given text in a few sentences.

Me and my girlfriend have been together for a bit over six months now.  She's had some strange behavior before but nothing like this.  Although I guess I wouldn't have noticed anything really weird because we only just moved in together since she recently graduated from school.

Anyway on to the problem.  My girlfriend doesn't like to share her laptop with me at all.  Even if I just want to look something up on google, she will make me use my phone, even if her computer is right there and open.  If we're watching netflix together in bed, we can't use her laptop, only mine, same for everything we do together on the internet.

Then there's also the secretiveness about it.  If I pass by and she's doing something online, and I ask her what she's doing, she'll get really defensive about it and ask me why I need to know.  All I'm trying to do is make conversation but she just sort of hides all of her computer activity.  She'll x out of anything she was doing when I walk by and only go back to it once I'm out of sight of the laptop.  I mean, she's mostly normal in every other way but this is just something that doesn't seem normal by any stretch of the imagination.

Is she hiding something from me?  Should I be worried about her?  Am I overreacting?  I just need to know what's going on.  I've tried asking her about it a couple of times, just gingerly, but she gets defensive about that too.
<bot>: My girlfriend is very odd about her computer and secretive/possessive towards it, is this something I should worry about?