This song seems to be about a guy giving it one last try to keep a relationship going, he's trying to get the other person to remember all the good times they've shared through their time together ('Think of everything we had'), and make them think about whether or not they really want to lose all that ('So just take this time to think') and the chance to make new memories ('Think of everything we haven't had') . He's trying to convince them that there could be a future for them ('I still believe in you'), he's made his view that he wants it to carry on very clear and he's leaving it entirely up to the other person ('It's all up to you').
This song seems to be about a guy giving it one last try to keep a relationship going, he's trying to get the other person to remember all the good times they've shared through their time together ('Think of everything we had'), and make them think about whether or not they really want to lose all that ('So just take this time to think') and the chance to make new memories ('Think of everything we haven't had') . He's trying to convince them that there could be a future for them ('I still believe in you'), he's made his view that he wants it to carry on very clear and he's leaving it entirely up to the other person ('It's all up to you').