Question
i planted a small meyer's lemon tree this spring and it is growing great had a ton of fragrant blooms and lots of little green baby lemons which all fell off.  They never grew much larger than a lima bean.  Why didn't they continue to grow...they fell off.
also, how do I prune it to train it to be a tree...it looks like it is headed towards being a bush

Answer
I had the same thing happen to my lemon tree when it was beginning to mature, and it seemed like it was it's way of saying it just couldn't handle the fruit yet. As the years have past since then, it still sheds part of the fruit, but each year more stay on, and mature. This year was the best yet. The tree is about eleven years old now. I have picked ten lemons, and there are five more still on it.

The other thing to note is, it takes almost a six months for the fruit to mature. I am harvesting fruit that were set last fall. I winter my tree in a greenhouse, that is about 45 degrees, with good air circulation, and light. I water it often all winter. It seems to dry out quickly. I also seem to have a few aphids every year, that are eaten when I move the tree outside in the spring. I have found that it does best in morning sun, and afternoon shade. Fertilize every month during the summer, and don't let it dry out.
As I mentioned, my tree is eleven years old, and it is only about four feet high. These are not big trees. They will remain small, and compact. I would not worry about pruning it, unless you would like to shape it by removing some of the lower growth, and rounding the top. Remember the more you prune off, the more chance you are taking off potential lemons.
Keep the tree healthy, and it will eventually be mature enough to give you plenty of fruit.
They make wonderful pies.