She didn't have a boyfriend because she was sealed off from Society as a child and as a teenager and she was imprisoned in 1917 and died 1 year later at the age of 17
Anastasia was killed in 1917 by the rebels who won the February revolution. The royal family was brought into a room and was given two chairs, being told that they were getting their picture taken....
She was the (alleged) sole surviving daughter of Czar Nicholas II, and thus the De Facto (Girl Czarina of all The Russias) There is evidence pro and con her verity. My feelling is she was legitimate...