Is he not into me anymore?

I’m having a long distance relationship with a guy. We are not official. He’s had his first exam today in the morning but this whole week he claimed he was studying. He only sent me brief messages though out the week. Today is Friday and he only sent me a hey morning text and I’m done with my exam. I replied and he hasn’t replied all day. Maybe he’s partying out with friends. But is it safe to say that he’s not into me anymore?
Is he not into me anymore?
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