Abandonment Issues

In July my boyfriend is leaving for a music camp in Michigan for 6 weeks. I am super proud that he was able to get into this camp but also super worried. Because of past relationships and the fact that I've been left behind and abandoned many times I am extremely anxious for him to be leaving. I also have an anxiety disorder and I know deep down that he would never leave me or do anything to hurt me but I would really like it if I could get a handle on my anxiety before July comes around so I can at least enjoy my summer and not be so extremely worried while he's gone! I am also the type who thrives off of face to face interaction so the fact that I won't be able to see him in person for 6 weeks throws me off a lot. Does anyone have any advice on how to deal with this kind of stuff?