This was a young adult book/s. There were a good four or five books in the series. The books are pretty short as it's easy reading.
The main character is a girl. She accidentally time travels and meets a boy. I think his name is Staten or his family runs a lot of things in Staten Island.
I believe in one of the last ones at the beginning she time travels and ends up in a winter area, and she's in a yellow sundress.
Her boyfriend that she time-travelled to meet was put into a mental institution.