- **Protectiveness with electronic devices**: If your partner is always on their phone or computer, and doesn't let you see what they're doing, they may be hiding something from you. 

- **Periods of unreachability**: If your partner often disappears without telling you where they are, or doesn't answer your calls or texts, they may be spending time with someone else. 

- **Different levels of sexual interaction**: If your partner suddenly wants more or less sex, or shows interest in new sexual activities, they may be influenced by another person. 

- **Inconsistent explanations**: If your partner gives you conflicting or vague stories about their whereabouts, activities, or acquaintances, they may be lying to you. 

- **Altered schedule**: If your partner changes their routine without a valid reason, such as working late, going on business trips, or joining a new gym, they may be making excuses to see someone else. 

- **Uncomfortable friends**: If your partner's friends act differently around you, such as being distant, awkward, or hostile, they may know something that you don't. 

- **Mood swings**: If your partner is happy and upbeat when they're away from you, but quiet and withdrawn when they're with you, they may be feeling guilty or conflicted about their cheating. 

- **Obsession with appearance**: If your partner suddenly starts to care more about how they look, such as working out, dressing better, or using new products, they may be trying to impress someone else. 

- **Secretive behavior**: If your partner becomes more secretive about their finances, phone bills, or social media accounts, they may be hiding evidence of their cheating. 

- **Intuition**: If you have a gut feeling that something is wrong, you may be right. Trust your instincts and pay attention to the signs. 

These signs are not conclusive proof that your partner is cheating, but they are warning signs that something may be wrong. If you suspect that your partner is cheating, you should talk to them honestly and calmly, and ask for the truth. You deserve respect and honesty in your relationship.