feeling sad

i am suddenly feeling sad all of a sudden. like this morning, when i woke up, i just felt sad. and sad for what?

sad for not being able to go for training
sad for not being able to play for the carnival
sad for not being able to play for the friendly against westwood
sad for having to stay at home doing nothing
sad for not being able to go to school to see my friends
sad for a lot more things that i cannot put down here.

all i have to say is
i miss training.
i miss my team mates
i miss the laughter during training
i miss talking to my classmates/friends
i miss going to school to study together
and i miss________(this is a group of people)