I'm too lazy to talk to girls.
Why are you too lazy to talk to them?
I think my laziness comes from a deep character flaw
If you have a deep character flaw, you should try and figure it out. You should not stop yourself from trying to be better.
It's not my fault that I'm insensitive.
You should try and take steps to change yourself here. There is no need to be content with acting this way.