<human>: Hey Reddit, obviously some of this information has been changed as I can't be bothered making a throw away and my best friend uses reddit.
The story is that I (female 25) have been best friends with a guy (male 25) that lives across town for more than a decade, however he started seeing a girl (female 21) and they became offical about may of 2012. 
His parents are going away to Ireland for 2 weeks in a week or so, and his parents asked me if I wanted to stay over, as I'm extremely close with them. But seeing as I get a strong vibe his girlfriend doesn't already like me (extremely short, doesn't make conversation, doesn't show emotion around me- i feel like she's guarded) I'm wondering whether it would be appropriate for me to stay at his house for two weeks? I've asked him about this and he thinks it's fine because we'll be sleeping in different rooms, still, I don't want to put her offside. I need some outside perspective, is this inappropriate behaviour?

Give me a shortened version of the text
<bot>: best friends parents want me to stay at their house while they go away. I'd like to know if this would be considered inappropriate as we're different genders and he has a girlfriend?