Should I have told him how I felt? Easy 10 pts?

I liked this guy and I had a gut feeling he liked me... Flirted smiled, went out of his way to talk to me.. AND STARED ALOT!! all the signs he was interested were there.. But I'm shy n never told or showed my feelings... Well he got a girlfriend and now he is rude to me.. Ignores me totally.. He still stares a lot.. But doesn't say hi or talk to me! Should I have told him how I felt? Or is he just a douche bag? Thanks for all answers!!! =]