Both being legal adults, yes.
No
with your parents consent yes
Yes.
Yes you can.
no
No.
In some states-depends on adult age in yours
no you will be nuked
With parental permission, yes, she can.
Check with US Immigration office.
yup
Most states would not agree to this "arrangement" for this reason alone there are laws that stipulate how long you must be married to qualify for citizenship and you will most likely need to prove you are in an actual relationship, as spouses to qualify.