Hi Jess,
I can sympathise, I haven't had a really full night's sleep in the last 3 years (not that I'm counting
lol) and I can't see it happening anytime soon, although there's always hope. I realise this isn't that helpful for you, but the fact is that there are just about as many sleeping patterns as there are babies - some sleep all night from a few weeks old, while some will still be waking fairly often up to school age! And sleeping, like eating and using the toilet, is something you actually can't MAKE a child do. You can provide them with every opportunity and encouragement to sleep through. When she's a bit older you can teach her not to wake you when she awakes at night. But she won't actually sleep through until she's physically and mentally ready.
If she seems healthy and her current pattern is acceptable to you, don't worry. If/when you can't cope and NEED her to sleep longer, there are heaps of gentle ideas you can try (eg Elizabeth Pantley's No Cry Sleep Solution) and it's just a matter of trial and error until you discover what works for you.