In Texas, the short answer is no.
A girl cannot consent to sex until she is 17.
Even if her parents agree and she's under 17 - they can change their minds and go to the police. You could be charged by the District Attorney's office for a sex crime and end up a registered sex offender for the rest of your life.
There is a "romeo and juliet" law in Texas but basically that is limited to when 2 teen-agers are within 1-1/2 years apart in age.
So if in doubt, walk way.