Adult Separation Anxiety...

My boyfriend almost died in an car accident because the driver took a wrong turn on a one way. Now he’s going on trip to see an internet friend out of state for a week. And I’m having anxiety attacks because I’m so worried something is going to happen to him because he’s in a foreign place with people he’s never met and staying in their house. I just don’t know what to do. Every possible bad scenario has gone t through my head I’ve expressed how I feel but he hasn’t really said a whole lot. I know I’ve made him feel a bit bad because he thinks it’s his fault :/ and I feel bad for telling him not to go because it’s selfish but I mean there’s nothing I can do now I’ve cried for three days straight to him about it and now he’s about to board...

Plus we have a trip to go on next month and he never talks about never helped out w planning and whenever someone asks what’s he’s doing this summer he always mentions their trip and I’m always standing there like ok then ,,

I’m so angry, sad, and scared and I don’t know what to do

Now he’s mad because im angry that he’s leaving he I’ve already told him I’m angry at myself too for feeling like that I just don’t know what to do. He’s really not getting why I have all this anxiety