Is the embroidery stitching technique called "cross-stitch" forbidden in Islam ?

I am a muslim women who likes to do embroidery at home. One of those embroidery is called "cross-stitching" which consist to do "X" stitching on a cloth in order to have as a finished product a geometric pattern or floral pattern on many parts of the cloth (like a tablecloth for example). You have to criss-cross strands of cotton in order to make a pattern. The reason i am asking this question is that a sister came forward and told me that it was forbidden because the stitching technique looks like crosses (actually it's little X's that you make wich doesn't appear much because of the tickness of the strands).The patterns that i do are not of human or animal kinds. Only geometric and floral. Allah knows best.