LO co-sleeps with us and wakes about 5-6 times a night. This is because he has a cold, and is teething like nuts. I breast-feed him back to sleep, and in this way, my sleep isn't THAT disturbed, although I long for a proper sleep.
I don't think you need to cut ties with your tiny baby just yet!! (I believe 18 years old is considered more the time for that). No matter how disturbed my night is, I absolutely love how DS snuggles up to me and it gives him so much comfort, my motherly instinct is so satisfied.
As far as DH is concerned, we just grab 'moments' when DS is sleeping. The work thing seems more important, though. On some days, I am so exhausted, I can't put a proper sentence together (literally), which can be quite embarassing as I go into university and have to contribute to seminars etc... You need to work out a 'survival mode' strategy to get you enough sleep to get through the working week. Something we tried and another poster mentioned on another thread, is letting DH look after the baby at least one night a week, and you sleep with earplugs in another room. I had to add a large whiskey to the equation! Also, going to bed super early on work days, and really, getting DH to do his fair share of suffering, since you will be working too.
Since it is teething season, does Calpol not help a bit for extending the sleeping?