Why won't he admit he misses me?

Ah so I called my crush the other day just to keep in touch and he asked me if I was ever going to stop by the old store I worked at ever. I told him that since I worked the same shift as him even if I did he would never see me. So then he asks me if I am off any this weekend. I simply replied with a flirty why? He said that he was off and yeah. I told him I could hang before work if he wanted and he said He didn;t know what his plans were. Asked him why he never calls and he said he is busy and likes having me call. So since he obviously does miss me why won't he just admit it instead of being all aloof?
Why won't he admit he misses me?
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