Trust issues and sexuality

My name is Valerie and I'm an incoming freshmen in high school. I've always identified as bisexual but when it comes to actual sex... The thought of having sec with a man terrifies me.  I absolutely know I'm not ready I just don't think this is normal. My biggest fear is being sexually assaulted or abused. I just don't trust guys in a romantic sense. As friends I have much less of a problem but as I'm going into high school I might have a guy persue me in a romantic and sexuall sense. I'm just horribly confused. I definitely want to date, considering I'm extremely lonley but at the same time I'm scared.