The sleep thing is just the baby. Nothing really you can do with some kids. I have 4 and every single one was a totally different sleeper. Still are all different now. My oldest slept in a cosleeper (bassinet that buckles to straps around the adult mattress so it doesn't move away from the bed). Slept there from birth to 4 months, waking up every 2 hours initially, then sleeping 11-7 with 1 overnight feeding. Then at 4 months, no idea what happened, but she just stopped. Was up every hour crying and needing to nurse. She loved her pacifier, but that just wasn't cutting it. We tried crying, her crib, mattress on the floor (when she was a little older), and nothing. I eventually night-weaned her but she still woke up only now she was up with no way to get her back to sleep. By 6 months she was in our bed full time just so I could nurse her all night and actually get some sleep so I could function the next day. She didn't sleep through the night till she was 2.5yo and had long since been night-weaned (and totally weaned for that matter), and given up the pacifier. However, 2.5 hit, and that was it. Just like a light switch, she got in her bed, slept there alone all night, 11-12 hours. Never a complaint, never looked back, never came in our bed overnight unless she was sick.
My 2nd one, I tried cosleeping for my own ease of night-nursing and he hated it. Also hated to be swaddled. So he slept in the cosleeper, slept 12 hours at night by 3 months, moved to his own room at 5 months.
3rd kid, bad, bad reflux and allergies. I coslept with her because she had to be so upright that even the crib wedge didn't do anything to help. So she slept on my chest as I sat up in a reclined position all night. Even with that, slept 10 hours straight by 4 months. We moved across the country, with a 2 week trip to Europe and 2 week drive across the country, plus hotels after selling our old home before leaving that state and here before our moving truck came, when she was 5-7 months. That screwed with her sleep (she was in a crib then) and she was waking up once or twice a night, maybe more, I don't really remember. But then once we got her crib out here and set up in her room, slept 12-13 hours straight, so I think the waking before that had to do with being in our room and being so close to me.
Now the 4th is here. Some night he stays in the cosleeper, some nights in my bed, some nights both. Sometimes he sleeps 8 hours, sometimes he's up every hour. I'm not worried about it, albeit tired of course, because he'll eventually get there.
Oh, and baby wearing, all of mine were worn during the days. Oldest in a Bjorn, 2nd in a sling, 3rd in a Moby wrap, and 4th in either a sling or wrap. I love them because I love holding my babies when they're still so tiny that they want nothing more than to be held all day, but realistically I need to get work done too, so the wearing devices are wonderful for that.
Oh yeah, how you cosleep, I also sleep with my arm in a C over the baby's head, primarily cause when any of my kids were in my bed, they wanted to nurse and that makes it way easier. I also generally have them between me and the cosleeper, so no risk of my husband rolling on them. Sometimes they've gone in the middle though and he was very cognizant of them being there and slept practically on the edge of the bed. We kept them on top of the blankets so no risk of them getting wrapped up in sheets/blankets. We also have a "snuggle nest" where the baby could sleep in it's own "cage" of sorts inside your bed, but hard sides so no rollover risk. My youngest used that inside the cosleeper initially cause he hated to be swaddled, but still liked the snug feeling of the tiny bed.
Sounds like the baby will grow out of this, from some of your replies. My friend has been very frustrated thinking she is doing something wrong, but I told her that all babies are different. I actually think the baby is teething as well (on top of regular sleep issues-the baby has always been up every hour for feedings since birth), but her pediatrician disagreed....
I tried to face her out and no go. I'm sure eventually she would have learned to reach up and punch me if I had kept it up.
There was no way my daughter would have allowed me to attachment parent her! 
Wearing her was akin to torture in her mind, I think. She hated being swaddled too. Right from birth if she couldn't move her arms and legs freely, she screamed bloody murder! Fast forward 11 years and she's a pretty serious ballet dancer; I swear she started practicing in utero.
If she had been my first, I would have seriously questioned my parenting ability. She was a challenging baby, that one! (But, she is such an EASY kid!)
