Needed advice I'm 18!!!!

So my bff is having casual sex with her ex. There no longer together but she loves him hes not ready to commit so he asks her to agree upon allowing him to sleep with other girls as long as he uses a condom and will only have raw unprotected sex with her. She spoils him and when she talks to her Male friend he gets mad and tells her to block him or he's done with her. What should she do???