A symbol for a heart. Usually used when you type it in the space bar of the computer because you are lonely. Or used when texting that special someone. ; ) .... or when texting your mom because again you're lonely... or just really love your mom... or your mom is cool enough to understand internet slang... ANYWAY <3 means heart

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

Turn you head sideways and you'll see a heart

When viewed sideways, appears to be the outline of a heart. Used in an expression of love.

Some people use this as a heart, but those people are wrong. It is clearly a ballsack.

Love, or Heart.

<3 is the emo heart. It is a mathematically way to define a couple. i.e. two people are less then three. Two people tend to be a couple...well you can do the math.