How many relationships have been altered because of one of these issues? I think we all can say we've had it happen. I think out of all of them 'Lack of Communication' is the worst. If you don't speak up and tell someone how you are feeling then it festers and then will ultimately explode. Lack of communication leads to assumptions, assumptions can lead to jealousy and insecurity, which can lead to trust issues all stemming from a silly post on facebook, twitter, or tumbr.
Speak up the minute something hits you the wrong way and you could save a realtionship. A relationship that you really cherish and count on doesnt need to be extinguished because of a silly miscommunication. Get off the virtual road more often and get back on the face-to-face, belly-to-belly relationship. A real relationsiop goes beyond text messages, email and social media.