i regret i'm a man,why not a lovely girl

do you mean what you said or are you having difficulty expressing yourself in English?

I regret spending so much of my youth in sheer escapism....I regret spending much of my adult life thus far in sheer escapism......I regret dumping college a matter of months before my exams and then not going to uni....I regret that i have never had the discipline to finish the writing projects I have started....

I regret hurting my ex and i regret allowing him to hurt me....I regret starting smoking and having stopped with great effort I now regret having started again....

I regret never having used my intelligence or talents for anything worthwhile.....

I have decided to do something about my regrets...I have decided to have a change in direction and am now investigating the possibilities of getting into teaching. I am thinking I will take a TESOL course to allow me to teach english to incoming asylum seekers and refugees.

Keep bashing away at the smoking. I gave up for three years, started again and succeeded in giving up again for good four months ago. You will feel when the moment is right, and it will work, but that's not to say there won't be many 'practice' attempts on the way. Good luck.
And as to doing something about the rest of your regrets - more power to you, go to it!