Should I stop being friends with this person?

I have fun with people at school but a girl from church keeps telling me that everyone there thinks I'm no fun. I'm admittedly a goody goody but I care about people and people seem to have fun with me. This girl knows I'm insecure about fitting in because I was homeschooled. In a way she's helpful because she's brutally honest about stuff. If I look good she tells me and if I ask about looking bad she'll tell me. But this really hurts. I listed a couple of people at church that I think think I'm fun and she said a particular guy will say anything to get in my pants, another girl is less fun than me anyway, and the other girl just hasn't hung out with me enough to see it. Even if I need to lighten up or something, she didn't have to be this mean about it did she? She's not exactly perfect but I just gently try to encourage her to change on a case by case basis (she can be a little bitchy and needy). I don't say it so bluntly. What should I do?