He began to alienate his partner: he may start to avoid interaction with his partner, such as reducing communication or refusing to spend time with his partner. He may also get angry or impatient easily.
He becomes indifferent to his partner's needs and feelings: he may start to ignore his partner's needs, such as his feelings or his hobbies and interests.
He suddenly began to dress better: he might pay more attention to his appearance, such as starting to dress better often or going to the gym.
He often travels or runs away from home: he may often run away from home, or leave home on the pretext of traveling or working overtime.
He has a new social circle: he may start to participate in various social activities frequently and make new friends, who may be single or have no contact with his partner.
His mobile phone and social media usage have increased: he may start to use mobile phones and social media frequently and pay more attention to privacy protection.
His interest in sex has increased: he may be more interested in the topic of sex or show more sexual needs.
It should be noted that these signs do not necessarily mean that men are cheating, but if these signs appear together, they should be taken seriously, consider frank communication with their partners and find a solution to the problem.