Love and " Pre-dating"

Recently , my friend Mr. X had a crush on two girls . Miss. A is the same age as he is , while Miss. B is two years older than him . He asked me to judge the two girls and I said ," You are the one to decide , not me . Anyway , why are you asking me ? You should ask Nicholas , he's an real expert about this thing ". After a few weeks , I found out that Mr.X was dating Miss. A . I then asked him about their relationship , and he said he was having a "pre-dating" to know how exactly they both are . I thought that was a smart decision , because , to tell you the truth , Miss. A was a happy go lucky person , while Miss. B was a quite bad-tempered person . Idon't know if this a coincidence , but suddenly Miss.B came out from nowhere .This was a bad time for Miss. B to appear . Guess what happens next ?