lol, in 6-12 months? Maybe not for another 2 years?
Here's what you have to learn: your husband is part of this too. Your roll of parent at home is NO LESS a job than his roll of working parent which means he has no less responsibility to help at night. You ARE NOT taking advantage of him. If you have to be up at all hours and work all day, so should he.
My husband and I worked it out by him having diaper duty since I was nursing and he couldn't help with that. I'd nurse, then nudge him and he'd get up and change the baby and bring him back to me to nurse back to sleep.
For the first 3-6 months, you have to feed him when he's hungry, around the clock, on demand. He will start to sleep longer stretches eventually, but if he was 6 weeks premature and he's 4 weeks postbirth, then he is gestationally still not even to his due date. But really that has very little to do with anything. If he's up every 2-3 hours to feed, then he's normal and there's absolutely nothing you can do but sleep while he's sleeping and get your husband to help as much as possible.
Since he's a premie and he doesn't have his mommy (and I mean this in the sense that he grew hearing one voice for 8 months and now doesn't have that), he's still getting used to you. Pemies have their own set of things they have to deal with. From what I've read, you can't expect new-born behavior and patterns until they are equivalent age past their due date. So, you are just catching up to full-term and now have to go through the typical 2-4weeks of new-born behavior.
The best thing for a premie is kangaroo care. If you haven't been doing that already, you've missed a lot of it. Premies and infants almost always sleep best against mom. Get a sling or soft carrier with an infant insert and wear him ALL THE TIME. The only time you should put him down is when you need to sleep. You can find safe bed-sharing rules on askdrsears.com if he sleeps better with you. But NEVER fall asleep while he's in a sling or while holding him in a chair or on the couch.
It's way to early to try to get set on a schedule, but you can introduce "routines" so that you always feed him when he wakes up (and then any time he routes and gives hunger signals) and a short bed time routine so he starts getting used to knowing that after a bottle, a book and a song, he'll be put to bed. You can add things like baths or baby massage, or whatever if you want. We always kept it simple and left baths for pre-bedtime playtime.
Hope that's helpful:)