After getting back together with Justin Bieber recently, Selena Gomez reportedly gets hurt again as on-and-off boyfriend cuddles with his ex.

The "Bad Day" singer recently took to his Instagram account to post a photo of him getting cozy with his girl pal Catherine Paiz and former girlfriend Chantel Jeffries, who actually was with him in Miami when he got arrested for DUI and drag racing in January. "Studio with these fools," he captioned the snapshot.

The 20-year-old pop star was also photographed putting his arm around and even whispering to a mystery woman's ear at the Moonlight Rollerway in Glendale, California, on Saturday night, June 28.

As a result, Gomez is now upset at Bieber for being a ladies' man. "It was over other girls, she found out Justin is still talking to a lot of other girls when he promised to stop," a source revealed to Hollywood Life. "Chantel Jeffries was one of them and Miley Cyrus. Selena totally believed Justin, so when she found out he wasn't being totally honest, she freaked out on him."

When Gomez confronted Bieber, the Canadian singer did not react so nicely. "He did what he always does and got super defensive -- and now they're not talking and Selena is hysterical," the source said. "Seeing Justin with other girls is horrible for her, it's driving her crazy. She doesn't understand why he does this to her, and she doesn't know what to do. He's got her questioning everything.

"She doesn't trust him, but she can't give up on him because she feels like she can't live without him. It's so much drama and it's not good for her, she's miserable but she doesn't want anyone to know how upset she is, especially Justin," the source said. "She's trying to act like she doesn't care and is totally happy but the truth is she's been spending half her time crying. She feels so humiliated and rejected, the games he plays with her head really mess up her self-esteem."