It depends... if she is happy and you are happy then it should be absolutely fine but you should check she is comfortable with the relationship and ask your friends and parents what they think of it.
No. There is nothing wrong with that.
11 is too young to be dating and second off a 16 year old should know better.
Nothing wrong with that
Yes it is wrong. A 14 year old boy is below the age of consent in all states and the 18 year old girl is an adult. This makes it illegal.
Yes
Yes
yes
Yes it is.
no.
who knows what's wrong with her.
No. It is perfectly ok.
not at all