monad
/ˈməʊnad//ˈmɒnad/
noun
technical
1 A single unit; the number one.
1.1 Philosophy (an indivisible and hence ultimately simple entity, such as a person.
Origin
Greek monas, monad- ‘unit’, from monos ‘alone’.
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Only you. You are my only one.
Only you. With you I have my fun.
Only you, and you alone
Will I call with my new cell phone.
Only you, a pretty, merry monad
Only you, with me, are never sad.
Only you, and you alone
Unless somewhere there's a clone?