Need advice- young adult decisions

So I’ve been with my bf since I was 15, I’m now 19. He’s 3years&11months older, in the military and has a 75% chance of being deployed to a “hot zone” and within his contract he’s a gun man.

He stopped by before going to work and told me about his hiking trip with his dad and how dad asked a serious question that stumped him.

“ what’s gonna happen with you and mags if you get deployed?”

I was completely stunned at this question because it ended up being “ are we gonna get married if I get sent out ?”.... and it’s not like its the first time he’s asked me... but its the first serious time this has came across to me.

Basically it comes down to this

If we get married:

• If he dies(God forbid), can I handle receiving a folded flag and immediately dealing with his funeral arrangements.

•If he comes home safe and sound, WE’RE MARRIED...( its not a bad thing, but it’s a SERIOUS step being a young adult)...with the possibility of not being the same people we were...

I really do love him. But things between us have been rocky in the past year. Obviously it’s not the “perfect” relationship. There has been a “cheating/infidelity” issue. We’re in the process of healing. Changes and more efforts are happening and being noted.

I’d really appreciate some advice. I’m open to all opinions. Thank you