Is there another girl or should I break up with him?

Hii, we're dating now for almost a month, he was all lovey dovey to me at first and talked about our future together. Suddenly, few days ago when I soft launched him on my social medias, he suddenly turned cold towards me. I tried breaking up with him but he gives me reasons that he's with his father's construction, busy with work, he's sensitive about the weather and his recent alibi is that he'll be working on evenings throughout July. When I get lovey dovey with him now, he doesn't respond it back with flirty actions like he used to. I tried confronting him about this but he says I'm the only one. But he doesn't call me 'babe, baby, my love' anymore. Just a while ago he told me he's going to sleep, but after 30 minutes, he have seen my reply. And his reactions in Kakaotalk are madly increasing.

Is there another girl or should I break up with him?
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