My husband is planning to go to abroad to secure our children's future, tell me how to deal with separation anxiety mommies?

With today's technology, we aren't really separated. You can make a schedule for when you will see your husband online and establish a routine once he's abroad. My sister who's a flight attendant has a crazy schedule but she has roaming, and whenever she doesn't have a flight, she's just on Skype with my niece. They don't even talk sometimes, they just log in and hang out :) You can see what each other's doing (she's eating whike her daughter's doing an assignment) and they don't have to have a list of discussion for the day.