What's Wrong with People?

Have you ever spared some time just to talk to someone, rushed home just to get to hear his/her voice before he/she goes to bed (let's say you are of different time zones), adjusted your schedule or turned down friends' invites because you'd rather be corresponding with that person then suddenly, you are left hanging in there - he/she just stopped communicating without even telling you why and you don't even remember saying or doing anything offensive at all? Then you just realize he/she started deleting his profile and everything as if someone is after him/her when you were just in the beginning phase and not smothering in any way and just retreated yourself voluntarily? Seriously, guys, what do you think happened?