My girlfriend of four years cheated me.

Before I answer your question, let me tell you an online joke:

A host asked a girl: What is your ideal marriage?

The girl replied: find two husbands, one is rich and the other is handsome.

Moderator: Then how do you live?

Girl: Live with rich people during the day and with handsome men at night.

Is your situation similar to this joke?

Your family is poor, but you are handsome and love her from the heart, but you can't meet her material needs. Your girlfriend found a rich man behind her back. Maybe the rich man just wants to play with her, but it can satisfy her material desire and vanity and make her face look twice as good.

What should you do? If you can tolerate her cheating, you can continue to associate with her. If you can't stand her dating another man and cheating, you can break up. You are poor.

Poverty is not your sin, but your regret. Strictly speaking, your girlfriend's pursuit of material enjoyment is not a sin, but an immoral behavior. Being poor is not good!