What should I do at this point?

Me and My ex-girlfriend were going out for a year and 3 months, and we broke up in April. We broke up because of me, because i f**ked up and kissed 3 other girls while i was with her. she found out about each one less than a day after because i told her. i realize now what i had and i realize that i love her, truly and dearly. we have talked and she says she loves me too, she says she just needs time..what do you think?