In custody facing 4 years

So I’ve just been going thru so many emotions. I got my bf arrested for dv. He broke my nose. I go from hatred towards him to wanting to take everything back and seeing him walk free right now. The da charged him with a gbi enhancement because of my broken nose. He’s facing 4 years. That is the only offer the da has given so far, but he hasn’t presented it to the judge yet. My bf/ex has been in county jail since July. It’s okay if you give advice but I just right now am wanting someone to give me some kind of relief as to how long he might be facing. I feel very guilty for some reason. I should have just never reported it.