Boy studying with girls

I am a boy who studies in school. I am very shy and modest and I do not like to be mixed up with girls. In my class I am from the engineering group in which there are 3 girls and 2 boys including me. My friend is mostly absent, so I am the only boy studying with the other 3 girls. I am very tense because of this as this is against my nature and I cannot tolerate this.

Moreover, those 3 girls like me and irritate me intentionally by continuously looking at me, or speaking only when I ask questions from teacher and intentionally going into and out of the classroom near my desk. I am very worried and cannot even study properly because of this as thoughts about those girls constantly come to my mind. What should I do to get rid of these girls.