How to know your girlfriend is cheating
1. She will start to nag a lot

Women can nag and that is nothing unusual. But what you need to watch is her constant nagging. She will nag about everything from the smallest to the biggest issues. If this is happening it could indicative of trouble. She will begin to magnify her partner’s imperfections and if she is smitten by the other man she will use that as an excuse to break up.

2. She will just friend line.

This is a classic explanation women used when asked about the other man. If you ask her, pay attention to how acts and answers. If she’s uneasy and refuses to give you eye contact and divulge more, chances are she is seeing him.

3. She becomes distracted.

Women are naturally great listeners and attentive creatures. If you notice she is losing interest and barely pays attention to what you’re saying, that means something else is playing on their minds. If she is serious about the other man, chances are her mind is occupied with ways she can leave you.

4. Always afraid of confrontation.

When asked directly by her significant other whether she is cheating or not, chances are she will not admit and try everything possible to avoid confrontation. She will remain silent, leave the conversation hanging or turn it around on you.

5.. loss interest in physical intimacy.

No matter how good she was getting it, she will lose interest in having sex if there is another man in her life. In most instances, this could the reason why she will pull away, act cold and distant. Kisses are quick and hugs are short could be a sign she is not interested in intimacy. Reason being she could be getting it elsewhere.
https://abasnaija.com.ng/how-to-know-your-girlfriend-is-cheating/

Is not a lie...my current gf is misbehaving and I tink 3,4,5 can say much about her new attitude

Op a girl might not do all these and still cheat. You can't understand all their ways.

trust women at ur own Peril

I think men should not give a fvck!!! Just keep fvcking, swimming with condom.