I feel so sad inside knowing we can't see each other in a while. I really want to see you again.
I wish I had a second chance to meet you again for the first time!
I feel so sad inside knowing we can't see each other in a while. I really want to see you again. 長い間あなたに会えないと思うと、心の中から悲しくなる。
もう2度と〜を "in a while" (長い間)にしました。
I wish I had a second chance to meet you again for the first time!
あなたにもう一度、最初に出会った頃のように、チャンスがもらえたらな〜
ご参考になれば幸いです。
友情と恋愛だと少し変わると思います!