How am i supposed to get thru not seeing my fiance for 10 months?

My fiance and I have been together on and off for 12 years. We're finally close to marriage and seeing the light at the end of this long nasty tunnel. But he needs help. He was abused in his childhood and can't stay here where we live because of triggers and what not. But I have a lease and kids. I can't just leave. He's leaving in 2 weeks to Jacksonville Florida to go live with his mom to get help to better himself for our future. I totally support that even though it hurts. Im just scared of losing him again. We've come so far. But I have obligations here and can't move to Jacksonville until June of next year. How will we survive this? I'll be lucky if I can see him for thanksigiving, his birthday in January and spring break in March.