Aw, mate. That is really rough. Natty was the same at 6/7 months old. TBH, I think it is behavioural rather than related to hunger or pain. I think it's likely that she needs the comfort of boob to resettle to sleep. (And we tried a FF before bed JIC it would carry her through longer - firstly, she didn't know what to do with the bottle and when she did seem to drink some it made bugger-all difference).
I reckon you've got three options:
1. Battle on through until the phase passes. (It may take quite some time, but G will not be waking every 2 hours forever.)
2. Co-sleep. You and G will form an arrangement where she can just help herself (I have no personal experience with this though as neither of my girls have settled in bed with me).
3. Teach to sleep. I did this with Natty and yep, it was horrible. But she did learn to sleep all night most nights after about 3-4 days. I wouldn't ever recommend it to anyone - it was a very lonely, depressing time for me. However, I can totally relate to being in that position where you are desperately tired all the time and feel you have no other option. A good place to start is to ring Tressillian's helpline and they will give you some advice and support. You can ring anytime of day or night.
I HTH a little. All the best.