<human>: Can you give me a shortened version of the text?

the title says it all. 

She was his childhood friend (we're all in our teens) and she moved out of the country, and now is back, she just arrived tonight. I have no idea how long she is staying and she is even staying in his apartment (granted he still lives with his parents). I'm feeling extremely uncomfortable with that and he knows this. I don't know what to do. 
Our relationship is fine, and I'm not particularly worried about him cheating. This was all just very sudden and I'm feeling very uneasy, what should I do?
Am I being irrational?
<bot>: boyfriend's childhood (f)riend who he hasn't seen in 5 years is staying at his house for an unknown about of time and I'm feeling uncomfortable about it.