My girlfriend and I have been having some problems lately and I am worried that she may be seeing somebody else.  I hope I am wrong, but there are a few things going on that are making me think this.  We both have cell phones and we have a regular land line at our house.  I rarely use the house phone and she knows that.  I was scrolling through the incoming calls on that phone and I noticed one number tht has been calling frequently.   The calls are at  about the same time each day, when I am not at home.  I am going to find one of those phone book search sites and see if I can figure out who the number belongs to.  I hope its one of her sisters or something.