Do you think mixed/bi-racial people are not enough of one race to be accepted ?

i am mixed, being Puerto Rican from my mother's side and Guyanese, Saudi Arabian and African decent from father's side. i have a medium brown skin tone thats not too light not too dark(someone once asked if i was from Bangladesh)...being rasied with more influence from my puerto rican side i consider myself to be more puerto rican but a lot of people in the spanish community says im not spanish enough to be puerto rican....im not black enough to be black im not guyanese enough to be guyanese and not suadi arabian enough....if im not enough to identify with my mixed cultures then what am i??? because i know pieces of my cultures and i speak spanish too....