Left early acting strange

So my guy friend came over last night. He ended falling asleep after sex. At 6am,i hear him getting up and he’s kind of looking annoyed. He doesn’t say why he’s leaving. I asked him if he had to work and he said yes but the way he said was like just to brush off my question. Like there’s another reason he’s leaving. The first time we hung out, when he left he gave me a hug and kiss. This morning he barely gave me a bye. Like what could have happened? Maybe he wasn’t supposed to stay over and had a girl? Or am I overthinking?