Selena Gomez Posts Cryptic Instagram Message

Selena Gomez and Justin Bieber give new meaning to the phrase on-again off-again couple.

At this point, it's a daily guessing game if the two are together or not , and we get the feeling that Gomez isn't happy about the unstable nature of their relationship.

This past weekend, Bieber was seen getting close to three different ladies . He was first spotted with his arm around model Kayla Phillips at Chris Brown's 1st Annual Skate Party in Glendale, California, and later posted a photo of himself getting cozy with model Chantel Jeffries and Catherine Johnston-Paiz on his Shots page.

Following Bieber's babe-filled weekend, Gomez posted a cryptic message on her Instagram account, along with an extremely emo, close-up selfie. "Class never runs scared. It is sure-footed and confident, and it can handle whatever comes along. Class has a sense of humor. It knows that a good laugh is the best lubricant for oiling the machinery of human relations," she wrote on Monday, June 30.

Despite her moody selfie, Gomez didn't spend the day moping about. She was spotted by photographers while leaving a friend's house in Hollywood and tried to keep a low profile, hiding her face under a large black hat .