I think you are a:
CHECKBOOK (UK: chequebook)
My prefix is the word I want, while it's an abbreviation.
What you really want to be able to give out right now is a CHECK(MARK) for a correct answer (i.e. 'check' here is short for - an abbreviation of - 'checkmark').
My infix is a negative that sounds like it has passion.
A cry of BOO! is a passionate display of displeasure (e.g. in the theatre or at a sports match).
Alternatively, as suggested by @Evargalo in comments, the passionately negative expression 'HECK!' would satisfy this too...
My suffixes are two separate words which can describe the look;
But users will not read through them unless they did what it took.
The two suffixes referred to here are BOOK and OK, which can describe the appearance of a checkbook in good condition (the BOOK is OK). But how do you know? Well, first you have to CHECK it, which comprises the letters you took away here in order to find your suffixes :)