NRE lasts different amount of times for every relationship, so it's hard to tell! I hope you'll be fine, I'm sure it's hard for him to be away when you don't know if you'll ever "get him back", if I'm making sense. Good luck!
Me: 31F, straight
Seamus: My husband, 32M, straight
Dragon: My boyfriend, 29M, pansexual, married to Fox
Fox: My boyfriend, 29M, homoflexible, married to Dragon