I am really regretful for my behavior at the party on the night of your birthday i.e. on 22nd of this month. I beg your apology and the apology of guests present there, through you. Please convey my apologies to them.
I have been feeling disrupted for spoiling your party that day and hope you will forgive me for my blunder that day. I was going through a mental trauma for past couple of days before your B’day due to a personal problem and it went out of my control that day. Hope you will understand my mental situation and will forgive me from your heart for my rude behavior towards the hosts as well as the guests.
Please forget that nightmare and give me an opportunity to reconstruct the bridge of friendship between us by giving me a privilege to treat you with a dinner.