Found out my husband did cheated with a man

Turns out my husband did stuff with a man. I discovered their messages and saw them exchanging naked photos of each other. I saw them saying really inappropriate things to one another. I approached my husband and he admitted to cheating on me with him. He claims that he did it because this guy could advance his career. He claims it was to become more successful. I’m having a hard time with this. Every time I try to ask he gets really really angry. I don’t know how to feel.