Sorry to read about your problem.
Often we find that someone senses infidelity before becoming consciously aware of it.
There are several signs of infidelity we often come across, and while they may not be conclusive, we have found they are often a good sign that things may well be amiss.
Some of the typical symptoms of cheating are:
Lengthy errands that take longer to complete than you might expect
Unexplained expenses on credit bills or statements
Erratic mood swings
Sudden changes in routine; Work is commonly used as an excuse to account for large gaps of time away from home.
Paying more attention than usual to their appearance
A partner’s sexual behavior changes: He doesn't want sex as often; he wants it more often; or he introduces new sexual techniques.