well basically because he’s a guy lol…but seriously if you want to know how serious he really is about you just back of a little bit and give him some space…from the sound of it he is just taking you for granted that you are there you need to start making yourself a little bit unavailable at times so that he sees that you do have your own life and he can’t just keep acting like you will always be there if he’s not serious about this
next time he asks you to meet up with him just tell him you can’t for whatever reason for that week if he’s really serious about this relationship he will make an effort to get together with you no matter what his life consists of