Answer:
This question requires a personal answer since it is based on a personal opinion. But I will give you an answer as example that you can take to adecuate it to yours.
Step-by-step explanation:
If I were Queen Elizabeth, I would make a law that allows marriage between royalty and commoners without any penalty.
Let us remember that at that time this type of marriage was very rare, and that even if the class difference was very marked, some kind of sanction could be applied to the person of royalty.
Assuming you only wrote "Queen Elizabeth" referring to Queen Elizabeth I, I will give you a brief explanation about her:
Isabel I was a strong, brave and fighter woman who ruled her country alone, because she did not want to share the power that she had so hard to achieve with any husband.
Daughter of Anne Boleyn and Henry VIII, she was orphaned at age 3 when she was executed, accused by King Henry VIII of adultery and incest (accusations that today are believed to be false, but that is another story).
From the beginning she demonstrated her ability to rule England alone, despite constant pressure to marry and give an heir to the throne.