Date, yes. There are no state or Federal Laws in the US that prohibit dating. Be conscious though that entering into a relationship with any minor in the US that is not supervised by others puts the adult in a precarious position. If an allegation of sexual contact is made, or if sexual contact actually occurs, the adult is in a prosecutable position.
No. She's a minor, you're an adult.
You can date anyone you want
yes
no...
Yes.
There are no laws regarding dating in Texas. There are laws regarding sexual contact, and he is taking a risk of being accused of illegal activity, even if nothing happens.
That's not a relationship that's a pen pal that comes to visit
NO! And the 19 year old guy should go to jail if he has done anything sexual with the 15 year old girl!
sure why not
Absolutely not.
yes
From what I understand Texas Law says that the age of consent is 17, as long as the older person is not more than 3 years older. So as long as the boy turns 17 when the girl turns 18 it is legal.