Why is Katrina Kaif upset with Ranbir Kapoor?

Bollywood hottie Ranbir Kapoor and his alleged girlfriend Katrina Kaif recently attended Arjun Kapoor's birthday bash, which was hosted by his cousin Sonam Kapoor.

Rumours say, at the birthday bash, Ranbir was too busy partying with his friends and did not pay much attention to his lady love Katrina. Katrina got so annoyed with this that she chose to leave the party early.

Though Katrina Kaif and Ranbir Kapoor never accepted the fact that they are dating each other, the duo are often spotted together in public. According to a leading daily, Katrina wanted to spend some time with Ranbir at Arjun Kapoor's birthday bash. But, Ranbir wanted to have some fun with his own friends. Hence, Katrina didn't like the fact that Ranbir is giving more priority to his friends over her.

It is said that Ranbir was so busy with his friends that he didn't even say Kat a proper goodbye. Interestingly, Ranbir's ex Deepika Padukone was also present at the party!