<human>: Give me a shortened version of the text

Throwaway since people know my Reddit account. 

My brother went to a party 2 weeks ago and met this girl there. They seem to be becoming pretty good friends very quickly, and he has brought her to our apartment twice to watch Netflix and study with her. Each of these times they have cuddled together in both his bed and the couch. 

Now my brother is single, but she is not. My brother told me that she is currently in a relationship with a guy who lives about 6 hours away, and that she has been texting her boyfriend during both of the times that she has come over. He assured me that he has no interest in a relationship with her, but I am suspicious due to his past relationship history.

Last year he actually slept with a girl who was in a long distance relationship at the time. He didn't know she was in a relationship the first time he slept with her, but after he found out he continued sleeping with her. I am concerned that he will try to do the same thing again with this girl. 

Should I be concerned about this? My brother a smart person, and does not usually lie to me, but the friendship seems to have developed in my view too fast to be purely platonic.
<bot>: My brother found a new friend who has a long-distance boyfriend and I am concerned that their friendship is not just platonic