Past Abuse

So I've been sexually abused in the past by a trusted person and only a couple people in my family know about it. Every time I get into a sexual situation now I start to freak out and have a panic attack especially when it's a sexual act that involves my past abuse. I'm scared to be with a man now. I'm scared to ever even possibly have sex with a man. I'm attracted to both genders but every time I think about doing something sexual with a man I start crying. It's so hard for me because what if I end up dating a guy I'm comfortable with and he wants to do sexual things? How do I cope and how do I get over it?