SkypeEmojis
is a resourse pack which adds 120+ types of different emojis from skype into a game as well as changes the text colour. Each emojis is represented in two types, i.e. original and black&white.
Their reliability has been tested on 1.7.X - 1.12.X versions of games.
Textures of the above mentioned versions are proved to be 100% workable.
Emojis are as following:
❤ ♥
Optifine is used for making animation stable and changing a pallet.
For your convenience, you may use a server plugin for emojis.
My good friend and mate Baksovic has developed it especially for you: ChatSmilies