I'm 6'1 and I like taller girls.
I think the phenomena you're noticing is that a lot of shorter guys will hit on tall girls, because it boosts their self-esteem. Look at Tom Cruise for instance.
Short guys feel a greater need to make up for their height deficit, and so that's a strong motivation to be more outgoing with women. In particular, they feel a strong sense of accomplishment to just be dating a taller woman.
There are plenty of tall guys who like tall gals, but we're not going to date you just because you're tall. We also don't have that Napoleon complex driving us, so if we're shy, we may have a harder time finding the courage to approach you.