Hallway Tilling Can I Tell My Friend His Brother Scares Me?

Can I tell my friend his brother scares me? - hallway tilling

Can (My best friends call him brother, "Joe") is a year older than he. And scared for some reason I can not put my finger Joe me. It is not intimidating, but it makes me uncomfortable, and when I saw him in the corridor that passes, I feel the need to make your head up and lead. If I behind me, so I have a detour. Came out of my class in the 1st Part of this morning, and I had to go elsewhere, to leave them. Can I say, my friend, this guy is terrible for me? Or is there something wrong with me?