I am ready to wean

my baby is 15 months and has been ebf since day 1. like no bottles, pacifiers, anything. We haven't even been able to go on a date night because my baby won't go to sleep without the boob. I can distract her during the day and give her snacks and water. My problem is nap time and bedtime. I can't get her to sleep without breast feeding, plus she wakes up everynight at 315 to nurse... every night, like clockwork. I just really need some advice on how to nighttime wean.. I am just so done. Thankyou