Replying to Help me settle an argument with my roomate

So I have owned a camo print pair of Vans and worn them constantly for the last three or so months. My roommate left to go home for a week to visit his parents and when he came back he had the exact same pair of camo print Vans (there are a few different camo ones but he got literally the exact same pair) He said he didn't know I had that pair but I live with him and I've had them for three months and kept them clean!

Is he not totally ripping off my style? Am I wrong to care? I get it that I don't own that shoe design but the fact that he is my roommate makes a difference right? If it wasn't something as noticeable as camp print, like straight blue or something I wouldn't care.