There's a thing called learning by your mistakes. Pushing your boundaries and getting out of your comfort zone are part of it. It is this behaviour that taught me the most about myself and the possibilies there are. This is not advice for people who are good with girls, this is for those who want to learn.

If there is something seriously wrong with the response you get from telling a girl what you really think of them for example, well, you need to assess just what is creating this negative reaction. Not ignorant, a more in depth way to deal with your issues.