Losing Yourself

Lost! I don't know how or when exactly it happened, but it did. I have no idea who I am anymore. I've molded my life and personality to others expectations. And now look at me. I'm nothing. I won't speak my mind to some because heaven forbid I upset you. I'm known as a "Pleaser." But yet I feel nothing, just empty. I know I don't like feeling like this but I don't know how to stop it. I'm a wife and a mother of a 3 1/2 month old son. I do or at least try to put up a good front, so it seems as if nothing is wrong and I'm doing fabulous. Somedays are easier then others. I'm afraid I might be messing up my son. And my husband, I know he can see right threw me, but I think he's afraid of what I have become. And it's easier to pretend that nothing is wrong. It doesn't help that for so long now whenever he did ask what was wrong, my reply was always and still is the same, "I'm fine." Why is it so hard to ask for help? No desire for much of anything.