I was too scared to move or say anything to him

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I’m 16 years old an yesterday I made the 10 hr journey from one end of the country to the other, and at the end of my journey I had this man constantly staring at me. Made me so uncomfortable but I was too scared to move or say anything to him. He even saw me take this picture. On the 5pm Edinburgh to London. He got on at York and got off at Stevenage.