Are guys intimidated by me?

That is a "real thing". Young women who project a lot of self-confidence or natural intelligence scare the young guys. They are after "easy" prey - and your attitude makes them realize that you aren't. it is a shame that none of them feel up to the challenge - you'd probably make a great catch - don't worry, you'll find a man who decides you are worth the effort - and you'll be very happy that you waited.