Went to bed really missing friend and bored (7)
I believe the answer is:
retired
'went to bed' is the definition.
('retire' can be a synonym of 'go to bed')
'really missing friend and bored' is the wordplay.
'missing' suggests deleting specific letters.
'friend' becomes 'ally' (I've seen this before).
'and' says to put letters next to each other.
'bored' becomes 'tired' ('tired' can be similar in meaning to 'bored').
'really' with 'ally' removed is 're'.
're'+'tired'='RETIRED'
(Other definitions for retired that I've seen before include "Withdrew from active participation" , "retreated" , "out of office?" , "Stopped work - went to bed" , "Left" .)