Hello and welcome to HealingWell,
Getting nervous is a natural physical reaction, but extreme nervousness can be described as anxiety. Extreme nervousness around social settings can be Social Anxiety. I suspect your idea of "romantic anxiety" is social anxiety.
Have you talk with your parents re how you feel?
Your young at just 18 and perhaps you fear the pressure of dating....because then there is pressure to kiss and do other things that come along with relationships.
I do remember being afraid to talk to boys/men. I felt awkward and uncomfortable and a whole lot of anxious.
My best advice - do not force yourself to go out with someone until your ready. Hang with your group of friends and someday you will know when your ready to take a chance.
Remember you are a good person, your bright, wise and happy most of the time......the choice is yours so do not do anything because of peer pressure.
and Heart/Cardiovascular Disease. "She Stood in the Storm & When the Wind Did Not Blow Her Away, She Adjusted Her Sails."