How to wean by baby off of breastfeeding

My boy is turning 2, and he still breastfeeds- mainly in the mornings, before a nap, and before bedtime. I love it - the closeness, him falling asleep in my arms, being able to always comfort him, but then some days I want to wean him. I have no idea where to start. He is really attached to me, and it's so heartbreaking to think this beautiful chapter of breastfeeding adventure will end! Are there any more of you still breastfeeding, and not planning to stop anytime soon?