Problem with Minecraft Comes Alive?

Okay i was playing minecraft (modded of course) and i had a boy, later (i gave up on trying to make him happy) I got a message. You know like when you get an achievement or someone dies. It said that " Your son Nealson has run away" Will he come back? Is he gone? What?

Hmm try to be more specific which mod what were you doing and i think there should be some forum's