Not everything you lose is bound to be a loss. So take a step back and reflect for a little while kid. Look at those who you want to be in your life forever, who support and love you. Then look at the ones you are not sure about and you'll realise that they might be someone you know, but not someone you wish to never lose.
Some people might always be uncertainties in your life. Don't let them. Stick to being certain when it comes to people, because you need to know that you can count on them.