Normal to a point, not if he harps on it, it's not like he can do anything to protect you but he just cares about you and wants you to be safe. Tell him look babe, I'm fine, do what you gotta do!
That is totally normal even for a guy who isn't oversea my bf does that all the time it might get on your nerves sometimes but all it should show u is he doesn't want to lose u at any cost i personally if i was a guy and your bf i would be protective too if someone tried to get together with my man i would wack the sh*t out of them
Pick up the phone whenever he calls and respond to texts asap
It's normal. Especially if someone is far away. Just tell him you're alright and remind him how much you love him :)
Send him various scantily clad photos of you with different men.