It's likely you're thinking of the 1943 film "Lassie Come Home", which is the first movie featuring Lassie. However, there is no movie "I Love a Lassie" with the year 1913 in its title.
There are several movies featuring Lassie, including:
* Lassie Come Home (1943)
* Son of Lassie (1945)
* The Hills of Home (1948)
* Courage of Lassie (1946)
* Lassie's Great Adventure (1963)
* The Magic of Lassie (1978)
If you can provide more information, I might be able to help you find the movie you're looking for.