When two people are close, they tend to share everything with one another. Usually they enjoy the company of the same friends and partake in many activities together. Very few secrets are kept between such lovers, so it may become obvious to one partner when they notice their significant other being secretive or behaving strangely. For instance, you may grow suspicious of your partner if you notice they are making frequent calls to the same number over and over again, and it's a number you don't recognize.

What should you do? If you have a strong relationship built on trust, the first thing you should do is confront your lover if it is really bothering you. Do not use an accusatory tone, and pleasantly inquire as to who they are calling. You can be teasing and a little playful to show that you are not trying to be overbearing, just curious. Your partner, if they have nothing to hide, should understand your natural curiosity and should have no problem sharing the information with you.

On the other hand, if your lover gives an aggressive response or is not forthcoming with the information, you may feel that he/she has something to hide. At this point, there is no reason for you to continue the interrogation, instead, find out more about the number he/she is calling by using a reverse phone lookup for assistance.

You will need the 10-digit phone number, so you will have to obtain it from your call display or via another method if you do not have caller ID service. Once you have the telephone number, enter it into the query box of a reverse number search website. If no information is supplied free of charge, and you really want to find out who the owner of the number is, you can pay a small fee to conduct a more detailed investigation.

Remember that regardless of the information you may or may not find when you lookup a number bear in mind that you are breaking your lover's trust in you, and your partner will not be happy should they learn you went behind their back to check up on them. Therefore, you should think long and hard about running a reverse phone trace, and it should always be your last resort.