Cupid shot 2 arrows, one was gold and sharp that represented love, the other was was blunt it represented rejection.
Daphne and Apollo were both struck with an arrow, Daphne was struck with the blunt arrow that made her reject anyone who wishes to love her, Apollo was struck with the arrow of love and affection to the first person he saw.
After Daphne was struck by the arrow, she went to go beg her father, that she wishes never to love. Meaning that she didnt want to get married, etc...
Daphne doesn't want to love Apollo, but Apollo is determined to love her. So Apollo is chasing her to give is love to her.
Since Daphne's Father has promised to never let her marry, he kept his promise when she had yelled for her fathers help, because of Apollo chasing her for her love and affection.
The outcome of her yelling for her father as her safe haven, she ended up growing branches, leaves a bark. She turned into a tree. Apollo loved the tree because he still saw her.