It’s one thing to cut your hair short, so as to have a “bob” cut look. It’s a totally different thing to get yourself a “manly” haircut, where you hair is so short that it looks like a “guy’s” head. In any case, love would need to go beyond looks for it to be long lasting. If your guy is so hung up with your hair that he quits on you when you cut it short, it does not speak much about his love for you. It’s important to retain a “feminine” look with a short hair.