I already posted 1 date-themed riddle, which was solved by Stiv. Here is a second one.
My prefix might be your response if your crush asks you on a date.
You may liken your relationship to my infix when things are confusing between you.
I advise that you take my suffix if you plan on any sort of intimacy.
Altogether, if you are impressed by him/her you may use my whole word to describe your feelings toward her.