Is he into me or just being nice?

There’s this guy at the gym I find super attractive he have been talking almost every time we see each other. I hurt my arm recently and he asks how I’m doing and he even said I don’t want to ge looking all cute on the beach wearing a brace. He even comments how tiny I am and he remembers so much of our conversations. He asked me last week what I’m doing after the gym I told him I gave work he’s like oh yeah you go in at 3 im like how did he remember that. But today he didn’t talk to me. He saw me talking to this lady we both talk to and he came over and joked around but that was it. I just don’t know if he’s into Or just being friendly. Please help!

Is he into me or just being nice?
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