what is it?

seriously, what is it with me and guys? am i that repulsive that i'm 18 and i've never had a boyfriend in my life? (don't answer that). don't get me wrong, i've had tons of guy friends-but that's it. nothing anymore than friends. what more do they want from me? i'm blonde, blue eyed, tall, and smart.
whenever i really get to like a guy there's always a drawback. they're either gay, not getting the hint, interested in someone younger, or else they're already taken! is there a curse on my life or what? god help me.