First commit. Just a beating heart.

init.lua

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+socialemote = {}
+
+function socialemote.show_heart(player)
+  local object = minetest.add_entity(player:get_pos(), "socialemote:heart_bubble")
+  object:set_attach(player, "Head", {x=-4.0, y=10.0, z=0.0}, {x=0, y=0, z=0}, {x=0.5, y=0.5, z=0.5})
+  object:set_sprite({x=1, y=1}, 3, 0.3, false)
+  minetest.after(5.0, function()
+    object:remove()
+  end)
+end
+
+minetest.register_entity("socialemote:heart_bubble", {          
+	visual = "sprite",
+	textures = {"socialemote_heart_animated.png"},
+  spritediv = {x = 1, y = 3},
+  animation = {
+    type = "vertical_frames",
+    aspect_w = 16,
+    aspect_h = 16,
+    length = 0.5,
+  },
+	springiness= 0,
+})
+
+minetest.register_chatcommand("love", {
+	description = "Shows a beating heart for 5 seconds",
+	params = "",
+	privs = {},
+	func = function(name, param)
+    socialemote.show_heart(minetest.get_player_by_name(name))
+  end })

mod.conf

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+name = socialemote
+description = Social emotes that appear next to the character
+title = Social Emotes
+depends =