I think he is definitely into you. He was talking a lot to you in the beginning because he wanted you to be attracted to him, plus he wanted to get to know you. In the very beginning, it’s normal to want to talk every day to the person because you are trying to get their interest. But now that he does, that he knows he likes you and that you like him back, he can go back to his normal self. Guys don’t like to text a lot plus, less texting gives you more quality time when you guys are together. I’m sure he likes you and that there is nothing to worry about.