I think you're wonderful for continuing to feed your baby her perfect food. Please don't let anyone, even an expert, tell you there is some perfect age for any of this stuff. If she's not interested in food, just go with it. She won't go off to college not eating food...
A couple of thoughts:
She could be teething. Think twice before giving her medication for this--ALL medications have side effects. I am working on a theory about it not necessarily being our job to take every bit of pain away from our children, and teething pain is the beginning of this. We are going to have pain in our lives, and if we don't cope with it as it comes on naturally and harmlessly, where does that leave us later?
She could be growing and this means she needs more food right now. Denying her this is no good for her little system.
You can try making your own baby food--we found a white plastic food grinder that ground up anything we were eating and made it interesting and easy. Have you ever tasted baby food? Blech. Also, rice cereal isn't great for babies (high glycemic index, less than ideal type of iron). If you dry-toast grains in the frying pan until they smell nutty and then grind them up in a clean (preferably new!) coffee grinder, you can cook them up easily and make your own yummy baby cereal.
Consider bringing her into your bed. You'll get a heck of a lot more sleep and lots of yummy, sweet snuggle time. That's what she really wants, and how we're biologically designed. Babies don't have to be so hard. I've written a whole lot about this on other posts...we have three amazingly easy kids who love to sleep and we didn't ever "teach" them a thing about it.
I know these aren't the most popular ideas, but you can do some research and listen to your heart and I bet you'll find your perfect solution. I would really caution against crying it out...it's not good for babies, no matter what their age, and can cause problems for them due to incredible amounts of stress hormones. There's a reason it hurts your heart! And comfort is a perfectly important and real need for babies, so if they nurse for comfort, it's okay in my book. I will give them whatever they ask for--they're pretty smart about their needs.
My last thing, that got me through all of those tough times, was to remember how incredibly brief this time is in your baby's life. I promise, you'll be looking back soon and asking yourself where the time went. You can do anything for a little while. Just enjoy it, every bit of it, while you can. Best of luck to you!