It's wrong to break up with someone over something silly.
Jenny's boyfriend got her a chocolate cake for her birthday, but she doesn't like chocolate cake, she prefers vanilla cake.
Jenny wants to react to the cake her boyfriend got her.
Jenny shows appreciation for the cake her boyfriend got for her birthday, feeling that it's the thought that counts.
Jenny tells her boyfriend that she's parting ways with him because he doesn't even know what she likes.
Jenny's boyfriend is happy that him buying the cake was appreciated by Jenny.
Jenny's boyfriend is really upset about the breakup especially since it was caused by something so irrational.