If you want to be with him/her just make a move but not to the fullest because you cannot decide what's in the end maybe you will be the happiest man/woman or you will end up full of sadness and hopelessness.
(I'm just expressing my feelings into this kind of book. Hope you like it.)
P.S. I don't find a Genre Teen(-Male Leading) so hopefully you understand and I'm not used into this kind of thing.