Guys, What endearments do you use with your SO as opposed to your "just friends" and acquaintances?

Folks are so quick to share endearments today, but I was raised to be more conservative and save endearing terms for people who are a meaningful presence in my life...

What terms (e. g., sweetie, dear, etc.) do you only use for your SO as opposed to anyone who falls in your friends/acquaintances categories?

Guys, What endearments do you use with your SO as opposed to your "just friends" and acquaintances?
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