How come my boyfriend doesn’t compliment me when I wear something sexy?

We’ve been together for two years and I know he loves me but every time I wear a slutty outfit he doesn’t compliment me. Last Halloween we were going to a Halloween party and I dressed up in a slutty Halloween costume that was super sexy. I thought this was the time he was going to compliment me because of how good I looked in it but when he saw me in it he walked straight past me and started talking to one of his roommates. I just feel upset that no matter how hard I try to look good he never gives me a compliment. What’s usually the reason if a guy doesn’t compliment his girlfriend?

How come my boyfriend doesn’t compliment me when I wear something sexy?
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