Anxiety about my relationship. Please help?

Okay, so for a little more than a year, I've been struggling with anxiety issues. This was caused by my now ex-boyfriend, because he was abusive and manipulative. Now I'm in a relationship again, and I love Jacob. He treats me like an absolute princess, and we're great together. We've been together a little over six months. However, my anxiety is interfering. Not with our relationship together, but with mental stability. I find it hard to keep from worrying about the future, and how things are now, even though everything's fine now. I always panic and worry that we're going to break up, or that something's gonna go wrong. Even though it's not. We have nothing to worry about, and I do know that. But I still worry unnecessarily, sometimes to the point where I can't eat. Please help me? How do I control this constant worrying? :(