what a sad thing to say....

my friends and i were planning to have some vacation after our final exam which is next week... but i have problem...we have already bought the tickets for next saturday...the problem is my boyfriend seems to be unhappy about it.. i do not know why and what makes him sad... i did asked him whether he wanna follow us or not..he says no since it is a all girl vacation....so i did not force him to join us but when i told him that i have already bought the tickets he seems to be very unhappy about it... what should i do then.. should i go or not? i really do not know what to do... i called him again to ask if he has anything to tell me but he says that it is okay for me to join mt friend and go for a vacation with them... i do not know whether is he telling me the truth...i was thinking that maybe i should wait for him and we should go together...i do feel bad about it but i never go to trip with my friends together i want to try new things with my friends i do not want people to label me as nothing without boyfriend...i want them to know i still cherish my friends... what i should do??? i thought going for a holiday should be a happy thing but why it is so different for me?