Unexplained calls, texts & emails. Says he's somewhere but he's not. Shady acting in general. If you have a gut feeling he is, he probably is. Pay attention. Then if he is, tell him you know and will not tolerate this behavior. DUMP his ASS fast and find someone who deserves a great person like you!
Weird change in behaviour, not giving enough time and anything which makes you feel that hez trynna hide his guilt.coz no matter what wrong doing hits everyones conscience...so itll come out from him too n as a result ull see the difference,,if thats the case (i.e. he's cheating) Please do dump him, seriously high time girls should get over with this forgiveness thing! Leave and move on!