Why do I feel safe around him?

I have a feeling of warm and safety whenever my crush is sitting close next to me.

Since he knows I like him, he doesn't even care much about me and sometimes deliberately ignores me. But, still whenever he is closely sitting near me, I have this strange feeling of closeness and warmth.

Why do I feel that way? Is it just me or is he sending out some kind of vibe?
Why do I feel safe around him?
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