My girlfriend has many friends of the opposite sex. Every night, those men send messages or call her late. What should I do?

I think your girlfriend may not love you anymore. If she wants to love you, she should at least consider your feelings instead of being indifferent to your troubles. You can discuss it with your girlfriend first and ask her to think about it for you. Don't be so careless, you will always be angry, or just tell her that you will break up with her again. If she is still indifferent, break up with her decisively; If she really cares about you, she can make some changes. Next, you should have a good talk with her so-called heterosexual friends and tell them clearly that your girlfriend has you as a boyfriend, so that they can respect themselves. I don't think their motives for calling so late are pure!