Be honest. Do you ever check what your girlfriend does on FaceBook? Research on the correlation between ruined relationships and FaceBook has shown that the more time people spend on FaceBook the more likely they are to cheat. This is also more likely the younger you are. FaceBook is great when you want to connect with old friends and stay in the loop of what’s going on, but too much can lead to jealously, stress, and break-ups. How much do you use FaceBook?