Has he lost interest in me or could something else be going on?

I’ve been talking to this guy for over a month. He was building the store I work beside, and that’s how we met. He has a very busy job and so do I, so we would talk at least once a day or every other day. He would start every conversation and ask me why I never initiate. Last time we spoke was last Monday and everything was fine. I didn’t hear from him all week so I decided to messaged him first on Saturday morning and he replied that he’s been working overnight and that he’s so tired. I told him it just seemed like he didn’t want to speak Anymore and to that he replied that he doesn’t understand why I think that, he’s just working. I didn’t reply.

Next day which was Sunday, he sends me a message and I just reacted to it, didn’t really acknowledged it because I’m upset with how this is going.

Has he lost interest in me?
Has he lost interest in me or could something else be going on?
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