Selena surfaced Sunday in a friend's social media post, where she's seen in a bikini and in open waters near NYC. She's all smiles too ... no signs of distress after the Biebs got on bended knee for another woman, despite so much history with the dude herself.
She hasn't been spotted cozying up with anyone as of late, so it's possible Selena's enjoying some solo personal time post-Bieber ... and post-Weeknd, too. Good on her.
Selena Gomez with Friends on a boat in New York [July 8]
TMZ broke the story ... Justin proposed to Hailey Saturday night during their trip to the Bahamas. His security team made onlookers put away their phones before he popped the question ... and she said yes.