9 Reasons Guys Who Used to Cheat Turn Into Faithful Boyfriends

4. His girlfriend told him, “You’re an adult, so think carefully before you act.”


“I had to agree with her. I’m too old to make careless mistakes.” It’s quite common for guys to start exercising self-control after their girlfriend tells them to “be more responsible.” Rather than setting boundaries for your boyfriend, it’s important that your boyfriend learn that for himself.