Ok y'all I need some advice but please dont be mean/rude. Me and my husband have been together 7 years (married 4). We…

Ok y'all I need some advice but please dont be mean/rude. Me and my husband have been together 7 years (married 4). We are getting into a rut where all we do is work, kids, bills etc etc. Lately my ex fiance from 7 years ago has been running across my mind. We were together for 3 years until I met my now husband. Just found out recently that he's engaged to be married. I'm happy for him, it's just the thoughts of that should have been me and all that jazz keeps running through my head. I love my husband 100% unconditionally. I just dont know how to get out of this rut and make the thoughts of my ex go away. I dont trust anyone to watch my kids for a date night. We keep fighting more and more lately and idk what to do. Any advice??