A man who was upset because his girlfriend might be sent to prison pushed her during a drinking session.
David Hill also damaged a landline phone and snapped her mobile in two.
Hill, 51, of Osborne Road, South Shore, admitted assault and two offences of damage.
He was bailed for pre-sentence reports by Blackpool magistrates.
Paul Foster, prosecuting, said the couple were drinking at the flat of a friend who had bought 32 cans of lager on April 16.
Hill began crying and punching himself in the head.
His girlfriend said she wanted to leave and he pushed her, causing her to fall back into a chair.
Trevor Colebourne, defending, said the day of the offence Hill’s girlfriend had admitted an offence of causing grievous bodily harm and warned she could go to prison.