Have a look at the following sentences:<br/><br/>"I learned to cook when I was 17 years old. Since then, I haven't had to worry about being hungry even if my parents are not at home."<br/><br/>"I learned to cook when I was 17 years old. Since then, I would not worry about being hungry even if my parents are not at home."<br/><br/>Are these sentences grammatically correct? If yes, do they mean same thing?<br/><br/>Thank you.