Einstein said it many years ago: “It’s all relative”. There are two possible points of view to the debate whether you are Jewish or not.
1. As the world sees you.
2. As you see yourself.
There is no doubt that the world considers you to be Jewish. After all, if your mother was Jewish, then technically you are Jewish too, and there is nothing that you can do about it. In addition, you live in Israel (the Jewish state), and you were educated in Jewish schools. I suggest that you will have great trouble convincing anyone that you are not Jewish (in their eyes).

As to how you see yourself? Well, that’s up to you. Evidently you are a free thinker and entitled to your opinion. After all, no one knows you better than you do.
So that’s it, everyone is right relative to their point of view.