I need help with my relationship! Grrr!

Hi ladies! I'm in love with this amazing guy. We both are super jealous, insecure, protective people with bad anxieties. I'm moving next month about 3 hours away for college. I don't know what I should do to try and assure him how much I appreciate him and our relationship and having him in my life. He's scared that I'm going to leave him when I have no intentions on doing so. I'm not planning on finding someone else nor do I want to. I just need some advice for both of us what we can do or say to make it easier.