Home work english essay help =) plz?

I was igned to write a 2 page essay on dreams i "REGRET" "GIVING UP" um.. how do you REGRET giving a dream up~?!?! you can always fufill them! UGh.. this topic is ticking me off, she gave the example.. when i was a child i wanted to be a cowboy.. i regret that... ugh.. WTF?!?? I could be a cowboy tomorrow if i wanted too!!!!!!!!!! =/ whats a DREAM you can regret giving up? if there is one =( i thought of one, and thats wanting to become a power ranger, and i regret giving up on that dream cuz i cant fit into the costume any more =) help on another one pleaseee? =DDD THNX