Dating after domestic violence

Ladies I need some advice. After a 5 year relationship I got out and long story short my ex went crazy and stalked me for months. Anyways this was a super toxic relationship that involved sexual assault on many occasions. It's been almost two years since I've been out of the relationship and I'm ready to start dating again. I'm having a really hard time because I just dont know what to say about it. The guy I've been seeing knows I've been thru some stuff but I've never shared with him what actually happened and that certain things trigger my PTSD from it. After tonight with him I got freaked out and I feel like I need to run because I dont want to get too close but at the same time I really like this guy and want to give him a real chance. I just dont want to keep bringing up my past in little bits all the time. I know as I get more comfortable with him I'll be able to talk about some of it but it's just so difficult to talk about in the first place. Any advice?