Fan of the cafeteria conversation. So... purely unadultered feeling. Being tired of being treated like a kid, desperate to be ackowledge by the person you love. And terrified of destroying the relationship.
That last part is the one that gets me the most. Everyone's always all for "just confess, what's the worse that could happen? If you don't, nothing will happen". Are you stupid? The worst that could happen is completely destroying the relationship you have. Is that not bad enough?