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

My younger brother(23) brought his girlfriend(22) of one year to a family event. Little background on my little brother he is a douche and a complete snake. He repeatedly cheats on his girlfriends all while pretending to be prince charming. Usually his girlfriends are kind of bimbos but this one is different. 

My nickname for her is The Most Interesting girl in the World, and she is beautiful, funny, nice, ect. I wont go into to much detail because she is a fellow redditor (hence the throw away account). Anyway we have been really hitting it off lately and talk a bunch. It kind of seems like she might feel the same way. The other day she was changing the oil in my truck for me and she joked that she wished she met me first. 

So the problem is do I tell her that my brother is cheating and that I have feelings for her?
<bot>: My brother is a douche and is cheating on his girlfriend who I have feelings for, do I tell her he is cheating and that I have feelings for her?