I really think it is me! I'm never happy...really happy!

Well life is going on, living like the Brady bunch! We have a normal family with normal issues...money...messy house...etc... nothing crazy or wild.  I have plenty to keep me busy. I got a new job that I really like (doesn't pay what I wish it did, but money is not everything). Jerry got a job he loves as well. We were blessed to get them in this economy!
The kids are all healthy and happy and doing well. We have a crazy dog, a big Oscar fish and a funny African Grey Parrot that talks up a storm.
When I was alone, I prayed for a life just like this! Now I have it and I am still not satisfied?? Why?? I can not figure it out! I have a good man that treats me well. I have great kids, pets and even a step granddaughter, who cracks me up. We stay busy with sports and cookouts and trips to the beach, etc... I go through the motions and smile on the outside but I still feel unfulfilled for some reason.  I don't get it!! Not at all!
I don't get the same joy as I used to get playing Mom and wife? Maybe it is my age? Who knows? I just feel like checking out and being left alone. My family goes out of their way to include me and try to please me but I am just grumpy a lot of the time. My boyfriend is funny and tries to make me laugh but a bearly crack a smile. If I don't figure out my problem. I am afraid he will give up on me. I wouldn't blame him. I want to leave me too!