Totally agree with girliefriend, this was exactly what we were doing. You must let her learn to go to sleep on her own.
We cuddled DS1 to sleep and he couldn't settle himself if he ever woke in the night, we eventually sorted it at over a year but were exhausted (we didn't make the same mistake with DS2).
Basically we started putting him down awake at his normal bedtime, saying goodnight, giving him his dummy then leaving the room. We listened to him cry for 5 mins (worst thing ever), went up and settled him again then did the same for 6, 7, 8 mins etc. In fact we never went past 7 minutes as he settled by then. If I'm honest it took about 10 days to get him completely going to sleep without even a murmur but he cried less and less each day. It really wasn't that bad as DH was there for support.
It only took us 1 night of him waking in the middle of the night, we got 5 minutes into 7 minutes (if you get what I mean) and that was it, he just went to sleep and never did it again.
We went to the sleep clinic (run by the health visitor), she talked us through it all, gave us a written plan, told us we had to start that evening and to call her with any questions. We really knew what to do but having someone telling us to do it and that it will really work just gave us the push we needed.
Lack of sleep is the worse thing ever!!!