The last time I checked, relationships aren't that hard....either you love them or you don't!  After dating each other for almost a year and a half, it looks like Justin Bieber and Selena Gomez are finally on the rocks.  If you didn't know, this means guys are laughing at Justin for leaving her and 13-year-old girls are screaming that he is single once again.No one really knows why, but according to TMZ Justin Bieber and Selena Gomez have broken up with each other a couple of times through the past few months.

Sources in a position to know tell us, Biebs and Selena most recently ended things last week -- but have since decided to give their relationship another try ... kinda."

So far everything seems to being going fine, they were spotted holding hands the other day at the Pink Pepper restaurant.  With a catch like Selena though, why is Justin going back and forth in their relationship?  According to Perez Hiton, sources say it always comes down to money.

People in Justin’s world think a 'single Justin' is more lucrative. With bands out there like One Direction and other heartthrobs, Justin having a girlfriend shows that he's unattainable — which isn't good for ticket sales, album buys and young screaming girl fans. People in Justin's camp are scared that it will ruin or stunt his career in the long run. But Justin and Selena are still in love and they are not breaking up."