What's my purpose?

Sometimes I feel like all I'm good for and will ever be good for is cooking, cleaning and making sure I make others happy and do things they want. Once in awhile I think that that's not right and that I need to not worry so much about making others happy but to focus on myself and be happy. When I think that I feel like I'm just being super selfish and so I go back to doing what others want and trying to make them happy. Today has been one of those days that I just feel like I can't do anything good enough and won't ever be able to. No matter how hard I try to be good enough or do good enough I feel like I fall short of getting there. It's so hard to tell yourself that you are good enough and that I can do things good enough. It's a battle that rages on in my head more often then I'd like it too. So how do I find the balance? Cause I know there has to be one. I think the thing I struggle most with dealing with these feelings is feeling like I'm selfish because I just want to be appreciated for what I do and get a thank you more often. Is it so bad to want to feel that way and get a thank you? Maybe it is and maybe it isn't but either way I feel selfish for wanting it. This is such a vicious cycle and I don't know how to stop it other then not caring that I am not appreciated or thanked for much. I don't want to get to the point that I don't care but I also am not sure how else to get through these feelings. I guess until I figure something else out learning to not care might be have to be it for now.