How would you like a woman to approach you?

I (18F) started college this year and I seriously don't know how to behave around guys my age. I have no problem interacting with older guys (30 and above), but that's because I grew up around old men and I feel comfortable with discussing all sorts of topics with them and I'm generally not attracted to them.

But men my age are so attractive!! They make me nervous and I either smile a lot or have a blank face when I'm in college surrounded by a lot!

I would love to try having a relationship and I wanna know how can I approach a guy in public! To all the men reading this, tell me what makes you feel comfortable around a women you're meeting for the first time? And how would you like her to approach you?