found out today that my best friend will be leaving for his new house on the day of my birthday because his boyfriend has to start work the day after . its such a kick in the balls for your best friend to choose his new boyfriend over you . i had an excellent birthday last year , so i suppose i will have a shit one this year .

Possible answers: 1). Their best friend moved far away from them .. 2). Their best friend is n't going to their birthday party .. 3). None of the above choices .. 4). They are starting to lose their best friend to someone else ..
Answer the following question: What may be the reason for their upset feelings ?
4).