My boyfriend is going away Saturday night to Sunday to see a family friend with his brother and dad. 

I'm anxious for a few reasons. This guy isn't a good person; he's cheated on 2 wives he's had. I trust my bf and we've been together for 4 years, but it's still unsettling. We also were supposed to go to a concert this weekend that we've been wanting to go to for months and this happened.

I have had separation anxiety due to trauma that occurred when I was 2 (currently 22). When he's gone, I cry and get super anxious and mad (sometimes). I think of the worst case scenario of things that will happen to me or him while he's gone. Can anyone offer any advice?