Nothing angers a woman more than betrayal. This is especially true if she feels she is being betrayed by her boyfriend. Men sometimes cheat and for a woman in a relationship with a man she suspects of cheating, proof is what she needs. If you find yourself in this position and you are wondering what the best approach is to catch your boyfriend cheating on you, it's a good idea to try and think like he does.

Most men follow a pretty standard routine. They go to work at set hours and then maybe they hang out with friends or go to the gym. If your boyfriend suddenly alters his schedule with little explanation, this may be a sign that something is amiss in your world. He may suggest that he needs to work extra hours or that he's joined an amateur sports team and has to attend practice. It's fairly easy to determine if he's telling the truth in either case. If your boyfriend is cheating on you and using work as an excuse he more than likely won't be pulling in higher paychecks. If he doesn't bring home a uniform to wash every now and again or if he doesn't seem all that tired after his alleged practice, you should be suspicious.

Many men will try and deflect the blame when they guilty about something. If your boyfriend has started seeing another woman he may suddenly begin accusing you of seeing another man. You are likely going to feel hurt by his unjustified attack, but it should be seen as a clue to where his mind is. If a man cheats it often brings up doubts about the woman in his life. He may begin to wonder if she is capable of being unfaithful as well. Naturally you'll want to throw his words right back at him and ask if he is having an affair, but don't be surprised if he vehemently denies it.

Also pay close attention to how he presents himself to the world. Many men fall into a comfortable rut when they are in a long-term relationship. If your boyfriend suddenly decides he needs to drop some weight or he's getting highlights in his hair, sit up and take notice. Just as he worked hard to impress you in the early stages of your courtship, he may be doing the same for someone else. Anytime a man suddenly wants to improve the way he looks, it's worth noting.

Once you do feel that your suspicions have merit it's a good idea to do some amateur detective work. If you want to catch your boyfriend cheating on you so you have proof you need there are a few things you can do. You can trace the numbers he calls on his cell phone, you can follow him when he says he's going to work or out with his buddies, or you can ask him point blank. In any case knowing the truth may be difficult, but it will certainly give you peace of mind.