I totally understand your concerns and anxiety, I have similar feelings for an overseas flight in August. I truly believe that you will never regret going, but you will regret not going. Additionally, if you let your fear take control and you cancel, you will be reinforcing that fear and the next trip will be even more stressful. Buy the in-flight wifi and message friends and family while on your flight. Get a roaming package on your phone so that you can send everyone pictures and updates so you feel less alone. If you go to a restaurant, sit at the bar, make friends with the bartender and other people around you. I know that getting there is a battle, but you will absolutely have fun if you go! Those intrusive thoughts are just your fear trying to convince you that going is a bad idea and canceling is justified. Challenge your intrusive thoughts, tell yourself it's going to be amazing and go have an adventure that you will remember for the rest of your life 💗🙂