How can I get more people to like me w/o pretending to be someone I'm not?

I must be doing something(s) wrong because family members, friends, in laws, coworkers, even people from the internet don't like me. I think the only person who likes me is my 10 mth old son because he doesn't know anything! :( How can I make more friends w/o pretending to be someone I'm not? I consider myself a nice person. I know I take life more serious than others and my face is not very friendly looking, but that's just how I am. It's not like I put a mean face on purpose. It's just that my neutral face is very naturally mean and sad looking. I mean it naturally just frowns even when I don't mean it to.