Has any one grieved over the loss of their partner?

I recently lost my parner of 15 years.We were highschool sweathearts.We parented three children.13,8 and 2.Does the heartache get any better?How did you get through the every day stuff.I have trouble sleeping.I have not slept alone in 15 years.we were the best of friends and hung out together alot.How do you pick up the pieces?