Why did it happen?
Suicidal thoughts can coincide with times of change - whether these changes are 'good' (like getting married or starting a new job), or 'bad' (such as someone dying or the end of a relationship). Quite often two or three different things will have happened, each of them causing considerable stress.
The circumstances leading up to running away are different for everybody, and the reasons for it happening may never be fully explained or understood.
Often those who think about running away may be experiencing a number of problems within the family home or at school. Everyday worries can become get totally out of proportion, and the only option of escaping those worries, is to run.