How do i liberate myself , i cant seem to have any ual feelings around people?

Oh well im bi , but cant bring myself to feel anything ual for anybody even if i find them attractive when am in public.Its like i feel guilty for having such thoughts , i am friendly and my feelings toward people are of friendliness but i cant go beyond that! and if i even do them i feel nervous, awkward when the person is nearby me ! i am 20 and i have never been in a relationship , any help please