In English I would say something along the line of 'Sorry! I forgot to invite you to the party'. This would be in conversation to a friend. How would this translate to Japanese?
Edit (First post to this site sorry!): My first ideas would be along the line of すみません、私は招待しにわすれました。Through looking in my 'Genki' textbook, this verb conjugation is mainly used for movement, not for the purpose I am using it for. Please could someone explain to me - if it is incorrect - why it is so?