I don't really think anyone truly gets over their first true love, they always seem to be in the back of your mind, residual feelings seem to linger. You might be in another wonderful relationship, you might be focusing on your career or you might be travelling the world or who knows what else... but there are days when they will cross your mind, maybe just randomly or because something reminded you of them, and you will remember the good and bad times you've shared, their face, words they said, things they loved, the way they looked at you... and you will think 'what if...' 'Where are they now?' and maybe even 'if only...'
With other loves, people will usually look back and be glad or relieved that relationship is over, even if it was a good one, but they never haunt you as your first love does.
Can you get back together one day? I've heard a number of stories about it happening through a combination of chance and different circumstances. Perhaps some people will say it's fate and that it is meant to be if that happens. You never know what's coming for you in life after all... so who knows.