My boyfriend always helps others. Should I be angry?

You should be careful. That woman is only one year younger than him. If there is no problem, it should not be so ambiguous. That woman really knows that she has a girlfriend, but she doesn't know how to avoid suspicion and disrespect you. Your boyfriend's explanation is a cover-up. Whether you take the initiative or not, you should persuade the other party not to call him so ambiguous and make his girlfriend jealous!