I've been alive for 16 years and 14 days... I've learned a lot of things, mostly things from school, but the one that I just relized and that probably means the most is this:
If you love something more than you can explain in words, and they're unhappy where they are, then you have to let them go... Even if it litterally feels like your heart is being smashed into a trillion tiny pieces, you have to do what's best for them....
And after enough time, it may or may not come back to you... Give it time... Don't rush it no matter how badly you want to...
Also, don't ever let your walls fall... Even when people say "I love you", they'll still hurt you... And those are the people that do the most damage and cause the most pain when they hurt you...
Don't be too quick to believe someone when they tell you they love you, even if you love them back... You'll end up hurt...
Life isn't a fairy tale... So wake up... Because if you don't wake up sooner, you'll get really really hurt...
That's the major things I've learn in my 16 years and 14 days here... I hope they help you before you get too hurt...