It's only natural to want to be liked, I think. I have (and always have had) a pretty intense need to be liked...And to have that 'like' laid out in front of me, because unless someone directly says things to me that mean they like me as a person, I go crazy in my head thinking they probably really hate me. I am a needy and neurotic little thing sometimes, even when I know on some level that it's just me being ridiculous.
As others have said, I've gotten better about it with age (not that I am at a wise-old-age yet by any means). It's also transitioned a bit. Not everyone is going to like me, and I'm learning to be okay with that, but I do want everyone to respect me. Which is a bit different, and much more genuine. I have a great amount of respect for some people that I don't necessarily like. Respect is more about integrity and honesty and truth. Which are things that I'm only valuing more and more as I grow older.