If a guy goes out of his way to help you, then is he interested or just nice?

Long story short, I met this guy in one of my classes, and whenever I need help with something, he always goes out of his way to help. For instance, I asked him about an assignment we had, and he sent me a very long text explaining it, and giving me tips, etc. then he told me he was happy to help me and to feel free to text him if I have anymore questions (with lots of smiley faces).
If a guy goes out of his way to help you, then is he interested or just nice?
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