It's not against the law to date anyone of any age. It's against the law to have relations with them.
yes, with the permission of your parents so ask and be asked! muahahahaha!
As long as they have permission of their parents they can in Texas. Otherwise they have to wait until they are an adult.
Can they date? Yes, as long as the minor's parents give permission for it, because the parents of a minor have the right to determine who their child is and is not allowed to spend time with. Personally, I don't know any parents who would give permission for their 15-year-old child to date an adult, but maybe these parents would. Can they have sexual contact (which is not limited merely intercourse, by the way)? Absolutely not.
If the 17 year old has permission of the parents. They have to be 18 without permission.
Yes, with your parents permission!
YES!
Answer: Legally, no not unless you have a parents permission. Even if you did have a parents permission you really don't have say so in where you live.
yes
Yes
not unless you have been amanciapted
With parental permission they could get married. But the age difference is not going to work out well.
Without their permission she will have to wait until she turns 18 in Texas. The parents are still responsible for them.