Do I like him? How come my heart doesn't race when he's around?

This guy is definitely into me, but I'm not sure how I feel about him since I've never experienced this before.

I'm in university, and in the past when I've had a crush, my heart would race like crazy when I see or think about the person. However, with this guy, when I think about him, I'm happy. When I see him, I'm glad that he's there and it makes me walk over and say hi. When we talk to each other or text, I don't have to calculate my every move- I feel at ease to just be myself and respond the way I naturally would.

Does this mean I only like him as a friend? Or have we simply began a mature relationship?
Do I like him? How come my heart doesn't race when he's around?
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