Why is my boyfriend always so tense or on edge?

We've been dating for a few months and he always seems to be walking on eggshells whenever we hang out. It's like he's scared to do/say anything, he usually gives one-worded answers and doesn't ask questions about anything, even though I can tell that he wants to. I've already thought that maybe he finds me too loud and intimidating, because I've been told that before. He's introverted and silent so I tried to acts a bit quieter and try to seem less intimidating (?) to make him feel more comfortable around me but it looks like I'm only making it worse. Why does he act like this?

Why is my boyfriend always so tense or on edge?
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