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Explanation: This is the traditional/literal translation. However, a word of warning. This isn't always the best way to say it. Depending on what and who they want to say it to, Japanese also use the terms
For example, confessions of romantic interest frequently use
suki desu. (Actually "Anata no koto ga suki desu.")
You might be better sticking to something like
daiji na tomodachi. ("Very important friend")