I night-nursed both my kids until they turned 2. Why not? Easiest way to get a kid back to sleep! Ignore your friends and what they think they know about what babies "should" be doing at night. Some level of night-waking is normal until well into childhood, and what works for their family isn't necessarily right for your family. In my experience, a baby who always sleeps through the night is more unusual than one who doesn't. Even my formula-feeding friends' kid's wake up at night and need their mommies and daddies to comfort them!
You might want to ask your husband- gently and at a calm time of day- why he thinks you should wean. Maybe he's confused about he different recommendations for bottle-fed and breastfed children? Many people recommend that babies be weaned from the bottle at a year, though in my experience there are plenty of babies who continue getting a bottle after their first birthday. Bottle-feeding can be bad for a baby's teeth, particularly if bottles are given at night. But breastfeeding has no such drawbacks, which is why it doesn't matter if you nurse for one year or 5 years.