Most Helpful Guy
I imagine everyone is different, but I think for a guy it's difficult to do. We're expected to initiate, so if there are strong feelings, they tend to build until we work up the courage to do something about them and ask you out, or until you make it clear you're not interested. I have trouble containing my feelings until I know they won't be reciprocated.
That's why, as harsh as it seems, in my opinion if I'm flirting or asking a girl out, it's better for a girl who is not interested in me to make it clear she is not, even at the risk of hurting my feelings. Trying to be too nice is unhelpful.
Most Helpful Girl
Absolutely. I usually push any sort of feeling I have for guys I can't have away as quick as I can.