Oh this is me too, but I am 42!
I dreamed of the day I would have my baby and breastfeed him to sleep in my arms. I love every moment of it (except for a brief biting stage at about 8months).
I dont want to stop right now but as my DS was an IVF baby I know I must stop asap and go back on the hormones if we have any hope of giving him a sibling. DS feeds all night and co sleeps. My DH doesnt like the teach to sleep idea (it will involve lack of sleep for him) and the softer methods haven't worked so far as DS isn't much of an eater, only enjoys Breast milk, not from a bottle just boob!
I wish there was an easy way to wean, even after I do it it's not a given that I'll get pregnant again, I feel like babyno2 is becoming less and less likely. I could cry!