A boosmyle is a special smile only used to show your deep affection and love for your boo. This smile is specially designed to silently express to your loving boo:

that they mean everything to you
that you are there for them every moment
that they are the most important person to you
that they are loved unconditionally by you
that you couldn't imagine life without them
that you appreciate them for the who they are
that you're there to share joy, happiness and sadness
that you miss them every moment they are away from you

A boosymle is deep, sincere, passionate, intense and everlasting...