# angel of Yahweh

"angel who represents Yahweh" or "messenger who serves Yahweh" or it may refer to Yahweh himself, who looked like an angel as he talked to a person.

# went up from Gilgal to Bokim

"left Gilgal and went to Bokim"

# Bokim

"Bokim" means "crying." 

# and said

"and said to the people of Israel" 

# brought you up from Egypt

"led you from Egypt"

# break my covenant with you

"fail to do what I said I would do for you"