There are several signs your boyfriend is cheating, and it should not be ignored. It is not something that you should be proud of, but rather you need to be wary of such situations. If you suspect that your boyfriend’s actually having an affair behind your back, it is important that you look into it. It has been reported that over 75% of the women have actually been fearing that their boyfriends have actually had affairs behind their back. This is something that reflects the growing amount of insecurity that is to be found among the women folk. If you want to do something about it, it is important of you to understand the signs of your boyfriend cheating on you. 
1. The first sign would be your gut feeling. If you feel that there are certain things in your boyfriend that is not at all adding up, then it is important for you to look up those facts, and make sure that they add up. If they do not, it is time for you to get into a confrontation and expect to find out something.
2. Whenever you happen to be questioning your boyfriend, you find that he gets extremely defensive, and does not have any sort of trust. Any question, which asked in the right sense, would also seem to be a question for him on trust. Even though you may find this very unnerving, it is amongst one of the first signs of infidelity, and he is actually wary about you finding out about this affair. He then goes on the defensive, hoping that you can actually give this topic a rest.
3. Most of the time, his excuses do not add up. You also find that he has been lying a lot of times, and over certain situations, he contended to get extremely defensive. Most of the times, the reactions that you expect from your boyfriend would not add up. You find that over a series of months, the entire process can be extremely harassing for you.
4. There is no amount of physical intimacy between the two of you. While physical intimacy is not something that can change a relationship, it is definitely one of the founding stones that can keep a relationship much stronger. If your boyfriend does not express any interest in having a physical relationship anymore, it is usually a symptom for a much deeper problem.
5. You come across phone numbers that were not even in his phone book before some days. The names maybe all guys, but there are some things that do not add up. You will not find that they had existed even before this day.
6. Whenever around his friends, he does not invite you anymore. The company events are all only for his exclusive visit. All of these are signs your boyfriend is cheating on you, and doing so in the hope that you can actually not understand about all such things..