There are many signs of a cheating boyfriend but one that you should pay particular attention to is how secretive your boyfriend is. A boyfriend all of a sudden becoming more secretive can signal that they may be cheating. For instance, does your boyfriend spend a lot of time on the telephone or on the internet? If so, what is their response when you ask them what are they doing? If you are given a "null", or a "none of your business" type of reply, be suspicious that something "may be" going on outside of your relationship.

Some indicators with the telephone and/or internet use:

- Does your boyfriend automatically get off of the telephone whenever you come into the room?
- Do they shut off the computer or try to prevent you from seeing what they were doing?

If the above is consistently happening, your boyfriend's constant need for secrecy may mean that they are trying to cover up another partner.