There is nothing that would prevent it in most places. There are a few where they would have to wait until they are 19 of even 21.
No. You are both adults at 18 and 25.
No
It is OK for a 18 years old person to date with a 5 years old person.
Yes, both are adults and can date/marry.
No, the age of consent is 18.
If you are moving on your own then you have to be an adult in the country you want to move to. Generally this is between 18 and 25
a lot a lot
Yes, you can legally marry her, but you shouldn't if the marriage is just to placate your overbearing family.
If your policy specifically states that the driver must be over 25, then obviously an 18 year old is not 25 and would not be a covered driver.
Assuming you mean consenting sexual acts between an 18 yr old and a 25 yr old- both are legally adults, and the law does not address sex between consenting adults.
Technically, you don't have a "guardian" after age 18, so at 25, one can move out. You are your own adult. This would depend on why you live in a group home at 25. There are many medical and mental conditions where the guardians get a court order to prolong their guardianship. If that is what your parents have they decide if you are allowed to move or not.
Not sexually since the age of consent is 18 in Arizona.