Justin Bieber Missin' Selena Again

0319-justin-bieber-instagram-selena-gomez-feels-INSTAGRAM-01Justin Bieber just can't shake his feelings for Selena Gomez ... at least that's what a recent post indicates. 

Bieber posted a throwback pic of him and Gomez locking lips on his Instagram account Saturday ... it's not the first time he's hinted at missing his former gf. You might remember, he gushed over Selena's look at last year's met gala a few months after the two called it quits. 

It's interesting, Bieber starts a string of three concerts in L.A. Sunday night ... maybe the throwback's a last minute attempt to get Selena to come, or maybe it's just puppy love.