Loads of boyfriend lessons? Only some (7)
I believe the answer is:
endless
'loads' is the definition.
'of boyfriend lessons? only some' is the wordplay.
'only some' indicates the answer is hidden within the clue.
'ENDLESS' is hidden in the letters of 'of boyfriend lessons'.
(Other definitions for endless that I've seen before include "Going on and on, interminable" , "Everlasting" , "Unceasing" , "Going on forever, lacking conclusion" , "Infinite, perpetual" .)