you should check the wannabes forums,or do a search on your topic (often discussed)
social life?....in airlines?...army?...rescue?....depends where you do your job,but I can tell you it's something else..
At 18 you worry about friends for life? If you do computers and you have to go work in some other city,or some other big company,you'll see how far your friends will become.So..
Pilots younger then 25? A lot...most of us were ..
It's a perfect job,but you have to be fit for it and you have to love it.Otherwise it can be a s
of a thing to do,sometimes.