Relationship anxiety

My boyfriend has recently left for a 10 day trip with two of his friends, and I know he is not the type to cheat but I can’t help but be worried.. we’ve been together 8 years and I know I’m just being crazy.. my anxiety just takes over and idk how to handle it.. we talked a lot about before he left because I needed to tell him how I felt and he reassured me that there was nothing to worry about, but my anxiety won’t stop ...