我从未忘记自己的目标，既然选择了，就一定要坚持.用英语怎么说

第一种：I have never forgotten the goal I set for myself. Once you make up your mind, better stick to it.

第二种：I will never forget the goal I am aiming at. Once you make the choice, you'd better never give it up.

第三种：I have never forgotten my goal, since the choice, we must adhere to.

I never been give up after I make a decision. I must keep going since I choose it.

I have never forgotten the goal I set for myself. Once you make up your mind, better stick to it.
or
I will never forget the goal I am aiming at. Once you make the choice, you'd better never give it up/