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T-Raww is getting the cold shoulder!

Kylie Jenner got all glammed up to attend Rihanna's Diamond Ball last night, and while boyfriend Tyga was also in attendance, it appeared the reality star basically ignored him the whole night! What gives?

Apparently, the E! starlet is doing her best to keep her world separate from her beau's, as to not mess up their respective brands. We get that from her perspective, but the rapper only has one hit song so his "brand" isn't exactly valuable.

The "Rack City" crooner is feeling the distance and not taking too well either! "He thought when she returned home from Miami, she would come running to him. He anxiously awaited her arrival, only to realize that she switched lanes on him and went to see her family and new nephew instead. At this point, Tyga wants to know what the deal is. He wants to know if they’re on or off, or even if Kylie’s interested. He wants an explanation or at least some closure," a source dished to Hollywood Life.

Ky is smart to give her man the brush off! After all, you can't cheat with transsexual MySpace models and expect your girlfriend to be there when you're finished!