(私はあなたに watashi wa anatani) 償います tsugunai masu. 埋め合わせをします umeawase o shimasu. お返しをします okaeshi o shimasu. ...etc. They are used differently in situations. You can omit the first phrase (watashi wa anatani). A naked verb will do in Japanese. I think 借りは返すよ kari wa kaesu yo. is most suitable between male-male relations.

Then you can say 償いをさせてほしいんです Tsugunai o sasete hosiin desu. ...Not to confuse you, I don't say many other words. Just say above phrase sincerely. She will never fail to accept your heart. Good luck !