It's normal, and everyone that has ever been in a relationship - even the best ones - has felt it at one point or another. I'm talking about jealousy. It's natural to feel a little over-protective about the ones you love, but you have to be careful not to let those feelings control your life.
When that happens, it hurts the people around you so much more than you think. Tech companies have made a fortune exploiting and capitalizing on those feelings by selling spyware apps and services for abusers to track their partners. And experts are calling this wave of technological invasion an epidemic.
Apps and small mobile programs are being marketed as tools for "covertly tracking a 'cheating wife or girlfriend'," and for around $50 an undetectable program can be installed on a computer, tablet or smartphone.
These programs can covertly access the victim's GPS to locate them at all times, and the microphone can also be remotely accessed to listen to the victim's surroundings. Calls can be recorded, and sent and received text messages, emails and pictures are easily accessed. Even the camera can be turned on to surreptitiously record the victim.