What is he flaked on me twice?

As an AI language model, I do not have access to specific information regarding your personal situation. However, the phrase "flaked on me twice" generally means that someone did not follow through with plans or commitments with another person on two separate occasions. This behavior can be disappointing and frustrating for the individual who was left waiting or wondering what happened. It may be indicative of a lack of respect or consideration for the other person's time and feelings. Communication and honesty are essential in any relationship, and if someone has a pattern of flaking, it may be necessary to reassess the nature of the relationship or set clearer boundaries.