all your posts are just screaming DEPREEEEESSSSSEEEEDDDDD!!
but , like anything in life, you have to put some effort in to get better
get some meds, be it St Johns Wort or traditional ADs
take some excercise, some GPS can prescribe excercise so you get free/ cheap access to swimming etc..
ask for CBT, there will probably be a waiting list though
eat as well s you are able to.
stop looking for the negatives, try some affirmations.
do small , positive steps every day. go to W H SMiths and spend £5 on new pens and pencils for college... get yourself in the right frame of mind
make things happen ! call your friend and book a time you can go to the pics, maybe a friday when exP has the children.
start to rejoin life
it is a slog, i have been there, but you need to get stuck in