My partner left me because we had a falling out now hes met someone else i love him so much?

ne1 help ive been with my partner for 6 years with have a 2 year old daughter together we havent been geting on great latley we had a row one night i told him to go and he did i realy thought hed be back now i find out hes met someone else she has a boyfriend and lives with him im so hurt and hart broken. i went out with my mates on sat night and who turnes up at the same club him i was very drunk and he came home with me we had it was great he then went to sleep so i looked at his mobile i no i shouldnt of they wernt nice texs he realy liked this girl i just wanted to hurt him like he has me so i texed her saying if he realy wanted u ys he in bed with me!!!!!!!! i love him so much but hes told me he wants her and that he really wishes he never slept with me im hart broken. what do i do