Ok so you guys know "The Castle" the one with the "Old Guns" mission??? so i went to the castle (not doing the mission coz i cant find it or how to activate it) and no one was there?!?!?!?!? Is this a glitch or do i need to do the mission first?????

Definitely a glitch. You should make more threads about it with ridiculous titles.

If I'm not mistaken, you have to get Preston Garvey to respect you enough first. I got the mission when he decided to tell me about it, not necessarily when I planned on it. Once you've got the mission, you and a few other minutemen will assault the mirelurk-invested castle together. So in short, take Preston around as a companion and do things he admires.

Well i have already cleared it out and got a small settlement there but do i need to do the quest for them to be there or are they there anyway and plus i have done so many missions for that bugger that im suprised he isnt asking me to marry him XD