Is he just physically attracted to me, playing games, or could there be something else going on?

At my workplace, sometime last year, around May, this man started talking to me. He has a management position, and I'm just a regular associate. He started showing interest in me in the way that he would ask me questions about my own personal interests, hobbies, etc. This went on for months, just getting to know each other at work and talking whenever we had time. Eventually, he asked for my number and said that we could hang out sometime. That same day that he asked for my number, he messaged me. We messaged for a good while, and we got to know each other a little more. But then, he stopped replying. A while after that, I decided to just message him, and again, we talked for a while. He stopped replying. I just stopped texting him or trying to reach out to him outside of work. Just yesterday, I had a male customer who needed my help, so I was with him for a couple of minutes. He saw that, and I noticed that he was standing nearby and trying to look out for me. He messaged me and asked me if I was okay, if I needed help, or if the customer was making me feel uncomfortable. I explained to him the situation, and he explained to me that he thought I was feeling uncomfortable. I thanked him, and he didn't answer anymore. I feel that he was looking out for me because of his management position but also because he was genuinely worried and he cares. So there's a lot of inconsistent messaging behavior from his part. But whenever we have messaged, our messages are never dry or boring. He still shows a lot of interest in person. He's a really outgoing and respectful man. He gives me compliments about my hair, he'll tell me when I look "really" pretty or when he likes what I'm wearing. He's told me twice that we should hang out, and I tell him that I would really like that, but he doesn't take the initiative to reach out to me to put a date on it.
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Now I understand he could be busy because he just graduated college and is looking for a new job but still. When you really like someone, you just go for it.
Is he just physically attracted to me, playing games, or could there be something else going on?
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