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How would I write "Happy Birthday my darling" in Arabic?

I don't speak the language but I want to write this in my boyfriend's birthday card. "Happy birthday my darling", or "happy birthday my darling Sam" or "my darling boy", something like that. Also, help with common terms of endearement would be much appreciated. Thanks :) Having it in Arabic writing would also be useful because I want to write it out.

Public Comments

1. "Durka durka, mohhammad jihad. Abak allah sherpa sherpa".
2. Happy birthday my darling- عيد ميلاد سعيد حبيبي happy birthday my darling Sam- عيد ميلاد سعيد يا حبيبي سام