disappointed on my own

Today could be say as 1 of the day that I feel disappointed on my own... as I should be going to have some badminton games with my friends, yet as a host and the one promised to fetch, I'm overslept... The time that I determined is 9.30am yet I overslept until 11.30am... this isn't something I want, by coincidently I overslept, and by accident I make my friends lost their trust on me...