You don't have to decide right here and now. Think about it until we meet next time.
You don't have to make up your mind right now. Take some time to think about it and tell me what you think the next time we see each other.
この場合、次のように言うと良いでしょう。
ーYou don't have to decide right here and now. Think about it until we meet next time.
「今ここで決めなくていいよ。次に会うまでに考えてきて」
right here right now 「ここで今すぐ」と言うこともできます。
ーYou don't have to make up your mind right now. Take some time to think about it and tell me what you think the next time we see each other.
「今すぐ決断しなくてもいいよ。ゆっくり考えて、次会うときに教えて」
to make up one's mind right now で「今すぐ決断する」
Take some time to think about ... で「…をゆっくり考えて」
ご参考まで！
カナダ 
