Personally speaking, if a stranger asks him for help, it should be that girl who is interested in him. If it is a polite promise, I think it is acceptable, but why should I help her occupy the opposite position? I can't take the other one. He really likes you and wants to fall in love seriously. Of course he shouldn't do such a stupid thing, if he is straight enough! ! But now, after all, you have no formal relationship. Helping other girls also gives him one more choice. It should be a little bit of that. He can also help the girl occupy other positions, or maybe test your attitude. If I were you, I would continue to observe for some time.