Is it normal to just send text messages? Experienced people give me an idea.

This is not normal. You should speak out boldly and let her know what you think. If she is still like this after you say it, it means that she doesn't care much, or it may be that he is inconvenient. Maybe he is as introverted as you, and likes calling or dating too much. You must take the initiative. If it just doesn't match, then bye!