What should a man do if he either calls or texts my girlfriend all night?

Love is not unilateral giving and connivance, you just have to do what you should do.

You should do a few things now:

First, adjust your mentality. You care too much about your girlfriend, but it turns out that she doesn't care so much about you. So you should relax, lest you get hurt one day.

You did the right thing. Normal girls will be restrained. Her reaction has proved that she is not the kind of girl who is responsible for feelings. In her eyes, you don't have enough charm to subdue her. Even if you get married, you will be more depressed.

Don't go around your girlfriend to find that man alone. This is not only a sign of weakness, but also counterproductive, because your girlfriend is also interested in him. The key is to say "flies don't bite seamless eggs" to your girlfriend. As long as you have a good relationship, you are not afraid of anything.

From now on, on the one hand, don't indulge her blindly, hit her hard and soft, and drag her back. What's said upstairs is that your girlfriend is happy with another man. Are you still laughing? Can't be unhappy?

Pay attention to the method, don't talk about strategy, don't condone inaction and don't lose your temper. On the other hand, broaden your horizons and at least be prepared.