It doesn't matter whatever happens to you, I'll always be your friend as long as you like me.
It doesn't matter whatever happens to you, I'll always be your friend as long as you will be mine.
It doesn't matter whatever happens to you, I'llalways be your friend as long as you like me.
(あなたに何が起ころうと、あなたが私のことを好きでいてくれるならずっとあなたの友達でいるよ。)
It doesn't matter whatevers happens to you, I'll always be your friend as long as you will be mine.
(あなたに何が起ころうと、あなたが私の友達でいてくれる限り私はずっとあなたの友達でいるよ。)
というのはどうでしょうかヽ(*⌒∇⌒*)ﾉ
It doesn't matter = 関係ない
whatever happends = 何が起ころうと
as long as ~ = ~ なら/な限り
以上、乱雑で申し訳ありませんが、少しでも参考になれば嬉しいです (*´ω｀*)ﾉ
No matter what happens to you, I will be with you as long as you love me.
あなたに何が起ころうと、私のことを好きでいてくれるなら一緒にいるよ。
No matter what happens (to you)；(あなたに）何が起ころうと、
As long as ... ; ...な限りは、
Whatever で言い換えることもできます。
Whatever happens, I still love you.
何が起きたって大好きだよ。
日本 
アメリカ合衆国 
