I want to create text box in article, but i dont want to use module or component that will use infor from category.

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Hi. The screenshot you provided does not include a text box? Do you mean a checkbox? You can always customize the K2 output by creating template overrides getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates

I meant 3 boxes with rounded corners, its a text boxes, but not pictures, you can actually copy text inside the box.
I was wondering is there component or module in addition to k2 that can create boxes like this or any other shapes ? (like in MS Word)

Unfortunately i am not aware of such an extension.