Crush's body language is sometimes reluctant/bored when I start conversations with him?

Not always, but often enough. When we're in a group gathering, sometimes he looks really interested in what I want to talk about with him, but other times, he almost looks slightly irritated when I start conversations with him (even when there's a lull in the entire group discussion). If he were attracted to me, wouldn't he continuously look eager when I try to talk with him individually?

Crush's body language is sometimes reluctant/bored when I start conversations with him?
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