hey mates i need some advice

so my girlfriend(17F) and i (15M) both have severely abusive parents. both us us escaped our fathers and are left with our toxic mothers. all the collective parents are emotionally abusive, bigots, and more. we both want to get out as soon as possible. but...

she's talking about joining the military, specifically air force, a year early, because that's a viable option. she wants my blessing, essentially, before doing anything. but i don't know what i want here either. she wants to keep dating, and so do i, but it's already hard to date as it is. over distance and all. and i still plan to go to school to be a pastry chef.

i want her to be out of that house. they don't even have a working dishwasher. but she would be gone for four and a half years. and as selfish as it feels, i hate the idea of not being able to see her. there's just a lot going on and i'm conflicted on whether to pick her happiness or mine, because no matter how much i want her to be free, i don't want her to be gone for four years.

does anyone have any advice?