Liam use to call you "baby" and you just didn't mind it, until you slowly got feelings to him and you're shy to confess your feelings to him, because you think it will ruin your relationship to him as a best friend

One day, he texted you and your smile slowly faded as you see his text. "Baby, I saw a girl pass by and she's so pretty! I'm shy to ask her name!" And you just felt your heart ached and you can't help but to ask him. "Liam.. What are we?" You replied while holding your tears and waited for his reply.

After a minute, you saw his reply. "Friends, of course ^^!" And you just felt your tears started to fall down your cheeks. "Friends" but why does he call you baby in the first place, when he just consider you as a "Friend" only? Is "baby" a call sign for a couples only?