What to do when being goth dissapoints my father?

Okie, I have really been wanting to change my look for a while now so my mom took me shopping. I got things “I” liked and my mom was okay with it. (These things include skinny jeans, studded belt, lots of black t-shirts, darker make-up ect.). Well I was happy then I went home. I went to my room and I put on a pair of black skinny jeans with a bunch of holes in it (not the slutish kind), a black tee with a foresty backround and a moon, a black ring, studded bracelet and my new necklece. I went into the living room to show my mom but when I said, “What do you think?” my father gave me a look that looked very sad or dissapointed and said,”Well it’s going to take a little getting used to.” I looked down and he said, “Arent those a little tight?” I said, “No not really and there werent any other kinds at the store (which was the totall truth). He just continued to look at me and I went back into my room were I am currently writing this. BTW: I am 13. Does my dad think I am looking sluty or is it he thinks Im making bad dissions or he simply doesnt want me to be looking like a, ‘punk’. Please help.