Justin Bieber & Selena Gomez: He’s Jealous Of Her Relationship With Samuel Krost

Is it too late to say sorry? Justin Bieber's figured out that he strung Selena Gomez along for far too long, and now she's got Samuel Krost at her side -- not him! Justin's feeling a little green about their closeness. Justin Bieber, 21, really doesn't want to think about Selena Gomez, 23, potentially dating  Samuel Krost. Though he's got himself busy with a myriad of lovely ladies, his ex-girl Selena is always on his mind. He'd just like to push Samuel out of it, because the whole situation is totally making him jealous, an insider told HollywoodLife.com EXCLUSIVELY! What's a boy to do?

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“[Justin] is trying to avoid all the Samuel Krost stuff because it makes him jealous,” the insider told HollywoodLife.com EXCLUSIVELY. “He hates that Selena has finally figured him out. He took her for granted and it is now coming back to haunt him.” Geez. Justin couldn’t make himself commit to Selena, despite calling her the love of his life, and now he may have lost her for good!

Though Selena was keeping up communication with Justin for a long time, she’s apparently starting to drift away from him — sometimes she won’t even respond to his calls or texts altogether! She’s got a handsome guy parading her around town hand in hand, and she doesn’t need any validation from her ex-boyfriend — especially a guy who’s currently linked to two other women! Has he already forgotten Kourtney Kardashian, 36, and Hailey Baldwin, 19?

Selena’s got plenty of fun hangouts with Samuel to focus on instead of keeping up small talk with her ex! But Justin’s feeling burned, and confused by her behavior, knowing he may have finally slipped up for the last time. “It really is screwing with his head because he is not in the drivers seat with her,” the insider continued to tell us. “It really is something he isn’t familiar with and he is trying to figure out if he should let her go for good or not.”

HollywoodLifers, do you think Justin has any reason to be jealous? Tell us in the comments!