Where's the friend I once knew?

I hate knowing that things that were once so close to you can change in the blink of an eye. Especially people. As silly as it may sound, my great grandma was my best friend. I called her each and everyday and we talked for hours on the phone. I'd go visit her and eat lunch with her on a daily basis during high school. I could trust her with anything and everything, and then suddenly it all changed.

I've been with my boyfriend, Jake, for 2 years now. My great grandma is very opinionated, but from the second she met Jake, she's loved him. They had a special bond. She can't drive so he'd always take her shopping and run her errands for her when she was unable to get out of the house. He treated her like family and would do anything for her. One day out of the blue, she voiced her opinion that she thought my boyfriend was running my life and ruining the friendship Grandma and I once shared. This surprised me greatly, for it seemed as if all three of us had formed a special friendship now.

Needless to say, I was devistated. How could two people I loved so much oppose each other? I confronted my great grandma and she had no problem telling me everything wrong with my significant other. It hurt to hear these lies she'd all of a sudden came up with. Although my grandma means a lot to me, what she said was very rude and I sided with Jake instead. Days and weeks went by without a phone call from my "ex-best friend". It sucked knowing that there was bad blood between us, especially because we were once so close, but I couldn't stand the thought of her dissing Jake for no reason at all. Especially when all he ever did was care for her.

About a month later, I decided to call Grandma to see how she was. We mended the rough spots, yet it's still hard to get over what she has said. Recently, I brought Jake to see Grandma, which was not a smart idea. She didn't even look at him, which was even worse. This past weekend, I went to visit her by myself. As I talked with her, I began to realize that she wasn't the woman I once knew. I still love and cherish her as a person and friend, but the argument seemed to demolish our friendship and the special bond we once shared. She's going on 90 this year, and I know we won't have many more years together. It makes me sad that things aren't like they once were, and makes me a little guilty as well. Is it wrong of me to have hard feelings towards her? I want to be able to move on, but I don't see things going back to normal.