Maybe he is shy. I am not usually shy person, but when I am near my crush I don’t know what to do. Sometimes I will try to flirt with her and try to seem interested and even though I like her I sometimes am just not up to it and I unintentionally end up looking as if I don’t like her. I wouldn’t be surprised if he is the same, but I don’t really know what this gut is like so I can’t say for sure. Just an idea.