Does it ever get easier?

I have a 15 month old daughter who I am madly in love with. She is an amazing individual whome I wholeheartedly admire. However I have a small problem. I can not stop wanting another one. Most of the time (usually when my daughter is awake running around like a crazy person) I am completely contet just having her. Also when me and the hubbs are doing cute things together or planning vacas ect. However in those quite moments with him or her, or when a friend finds out they are newly prego or I see a new baby all snuggly I swoon for another on the spot. Now my SIL is prego and although I am conpetely content with my life; deep down I yern for that again. We are realy committed to waiting a few years before we do it all again and I'm deff fine with that for the most part. I just need to know what the best way to curtail those desires to be prego again, and get a belly again, and have my hubbs be that cute expaectant dad again. Also to have a new baby to bond with and have that intimate quite feeding time that I get from feeding. I miss it all and moments like this I feel crazed with desire and saddened that it is still a far off reality. WIll it be this way for the rest of my life? Once you are done do you secretly crave more or at some point to you become satisfied with your family size...how do you know the best time to have another; and when does this yearning subside?