Earlier quoted context omitted.
Somehow I'm not convinced that it's better to convey my message by writing "I am flirting with you" rather than by just adding a winking or smiling emoji.
You could literally replace that emoji with the well known phrase "wink, wink." It is well understood and avoids the ambiguity of emoji.
I can scarcely imagine a faster way to look socially inept in text, than writing out so explicitly what are supposed to be nuanced and subtle actions. Eye roll.