If you start suspecting your spouse of infidelity, your whole existence probably falls to pieces. As much as the two of you were in love in the beginning, and had promised each other eternal devotion, something just changed as time went by. But nobody knows your spouse better than you, so if you notice that your wife or your husband has changed towards you, of course you become suspicious!

You may still love your husband, wife, boyfriend or girlfriend, but maybe suddenly you begin to see a different behavioral pattern with him or her. Your spouse may bit by bit seem to become cool and cold hearted and you don't have a clue why.

Now you might start to wonder if your spouse is cheating on you, but you can't ask them directly, because you can't know for sure. Slamming an accusation of that kind straight to their face might just make things much harder, if the reason for their changed behavior turned out to be something other than you thought.

But please don't rush into saying or doing anything that you shouldn't, before you have read about the 4 things that cheating spouses have in common:

1. Secretive cell phone behavior. Your partner leaves the room to talk in private, and doesn't want you nearby. You might even find out that they have deleted all traces of their calls and text messages.

2. Smelling from a different fragrance or cologne than usual. Have you detected that? Maybe your partner has become more self-conscious about their looks suddenly, and that could be an undeniable sign that something is going on behind the scenes.

3. Popping out at unusual hours. Working late all the time, attending endless meetings, and seeing people you haven't even known to exist! Just showing a very suspicious behavior!

4. Their internet browsing history deleted every time they leave the computer, and strange behavior during online chatting, checking e-mails etc.

The above signs of unfaithfulness are barely a tip of the iceberg, yet they are the most common ones. Still, you can hardly face them with your concerns and suspicions without firm proofs. Imagine what the stress of not knowing the truth is doing to your mental and physical health!

You need to gather evidence that your mate is cheating on you, but how?

Don't come outright and ask your partner if they are having an affair, because you will most probably just hear a bunch of lies. It is an absolutely necessity that you build a strong case against them first prior to facing them.

You could hire an expensive private investigator, or you yourself could learn the secrets that have been used for decades by PI's from around the world and have been proven to work, only for a fraction of the price of hiring a private investigator!

Amongst the things you need to learn is, how to reverse look up cellphone numbers, how to un-delete deleted text messages, and how to catch your cheating partner even when they are nowhere around! You also need to learn how to secretly access their phone records, capture e-mail passwords, and credit card statements!

Above all, you need to learn how to prepare yourself emotionally, legally and verbally prior to you confronting your partner. You've got to make sure that all your bases are covered, so that your spouse won't have a chance to lie their way out!