Should I start talking to my friend again?

[? Tango ?]

Well, my friend started talking to me again, for the first time in two months. She wants to start boarding her Mare at my house *again* (she stays for a month, leaves for a couple months, comes back, leaves, I know the routine now). I am pretty sure she will want to take over feeding again. The last time she did my horse was being fed one flake a day in the muddy (only one muddy spot in the whole freaking pasture!) and not good quality hay. She got mad at me for everything, from letting someone sit on my horse, to how much I was feeding my horse, to where I pet my horse, and she got mad at me for not taking my horse down the road. My horse is green! I am still having hoof trouble from the one time I did take him down the road on her command. She didn't want me touching my horses face because she said it would make him bite. She gets mad at me when I do something wrong (some of the time it's not even wrong), but doesn't tell me how to do it right, and wants my horse to be the perfectly mannered horse when she can't train her own. She texted me at least four times a week to not touch her horse, then got mad at me if I didn't give her horse attention! She also got mad at me because I didn't want to let her daughter (who has never rode a horse before) ride my green horse. I am a little bit nervous to let her back again.. I don't want to go through all the drama again. I don't know if she has changed any at all. Should I let her come back? I do owe her something, she loaned me the money to get my horse. She got every penny back, though. She also taught me how to saddle a horse. Should I let her come back again?