Was I rude in this awkward interaction?

[Anonymous]

I went into my workplace on my day off and I was sorta tired but my female coworker was being super friendly (but she looked a little uncomfortable since I wasn't talking much) and asking me questions like why Im their... Anyways as I was leaving she said have a great day and I just said cya... I should've said you too or something but I was half awake. Then as I was leaving I heard her and another coworker giggle and say "didn't care" I assume they were saying I acted like idgaf. I assume that cause the store was dead and there was nothing else going on.

. Was I rude or awkward in your opinion?

[Guy13]

Chat her up next time see her. “Not tired like was last time I saw you.”