<human>: My SO and I went to hang out with a friend and her roomate. We met the roomate for the first time that night. A few days later he added her (the roomate) on facebook. 

I can't see past how I as a woman (not that all women think this way) perceive this. I would only add a male person on facebook is we are 1) good friends 2) colleagues. 

He said she just showed up on his "people you may know" category and since they will be neighbors soon he added her. 

I am probably over-reacting but it just seems really strange to me. 

[We are both not very into facebook. He rarely posts anything] 

Hope this isn't against the rules :)

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My SO added a woman we met one time as a facebook friend. We are both not into facebook and don't spend a lot of time on it or posting.