I am 37 and I want to know what the 30's are supposed to be like

I feel like I am never really living in the right decade for my age. I feel younger some and older alot. I want to be around people who are in there 30's and know what that is like. Does this make any sense? I have much older friends. Do I want to date? Would anyone ever want me? What should I be thinking about? Do I want kids? Is it too late? Any help or input would be greatly appreciated. Lisa

If it helps sometimes I feel like an adult and other times I feel like I should be the kid. Drives me insane. My mother said she felt the same way when she was in her 30's... She said her 40's were a little better, but now that she is in her 50's she said she wouldnt go back.