There are certain people that I would move mountains for...
There are certain people that all you want for them is the moon - and when life darkens for them, all you want to do is be their sun. No matter how many people are in your life, no matter how many people you care about - there are always a core few that you hold in a whole other area of your heart.
What's hard about growing up - amongst other things, obviously - is learning that there's only so much you can do for someone else, no matter how much you love them.