I think she just finds you very lovable. Sometimes people just mean exactly what they say. It may be that she finds it is so easy to listen too you, to talk too, to trust you and believe you are a very sweet person. Usually very gregarious people are described as lovable.
Here is the thing about friend zoned people. Being friend zoned does not mean the person will never like you more than a friend. I told my husband at first that we would be friends only and he agreed that was fine. We both enjoyed each others company and liked the idea of going clubbing together.
Well I meant it and he didn’t. Before I knew it I liked him way more than a friend and I could tell he felt more for me. Three months later we were married. I found him to be very charming and sweet and I couldn’t stop thinking about him after the 3 hour phone marathon we had. The friend zone allowed us both to be open and honest about every subject. Something that regular boyfriends never did.
So if you like her. Continue to be lovable. That is not a bad place to be, nor a bad thing to be. It’s better than her saying you can be so despicable any day. If being open and honest doesn’t draw her closer to you, than so be it. In the end you may have a close and caring friend. You lose nothing by being yourself, and everything by pulling away.