I know we dont typically get involved with drama in this community, but I think this needs to be said.
You shouldn't worry about "copying others" when it comes to emojis. As long as you aren't directly tracing people, and if you give some credit if heavily inspired, then it's perfectly fine.
Emotions will look similar to how we express them, and this type of art is simply showing that.
If people claim that someone is stealing simply by having similar (but still original) styles, then they are being ridiculous.
Your style is beautiful because it is yours. It's how you express these emotions, these expressions. If it changes, then that is ok. it's natural to change. If it looks a bit like someone else's unintentionally, THAT IS OK! We can not always have a 100% original idea, but that does not make our interpretation of it any less OURS.
(Ty for listening to my rant and have some emojis by me.)