I slacked off at the end of college semester and flunked the class I'm so much better then that I feel so regretful about not giving my all. 
I know I have high potential so the fact I failed my college course had me down.
user
Well that's not good. I'm sorry to hear that. Do you think maybe you were just too nervous during the test?
assistant
The test and the whole semester I just didn't give it my all like I should have and now I feel really crappy and regretful I need to redo course and give it my all.
user
Never be too confident! You've got to give life your all at every step.
assistant