Why is Beto so upset with his father right after Thanksgiving and what does he tell Gabi about his feelings?

Beto is so upset with his father right after Thanksgiving because his father told him he would help him build a ramp for skateboarding in their yard, but his father got a call from his friends and dropped the whole project. Beto asks Gabi why their father does not love him and that he thinks all he cares about is getting high.