Don't think its not normal.
A lot of people have partners that are a lot older or younger.
If the realtionship is right then I don't see why it should be a problem.
Others may disagree with that, but when its love its love.
It's hard to imagine I would do that... but becuase of the situations I have grown up in
I know there is nothing wrong with it.
Do what feels right and respect the girl :)
Please answer my sexuality question :) link