Identification: My devoted plant, Roger. Help me ID him (with photo)

This guy has been with my family for over a year but I haven't yet identified him (haven't really tried until now either). He is a survivor for sure. He started as a little cutting from a friends plant and even though he was living in a small, dark apartment for quite some time and had a few rough times he has lived through it all and is currently thriving in his new sunny window. I'd like to know his biological name so I can provide him with better care. All I know so far is that he loves plenty of water and sunlight. I'm about to go re-pot him into a larger home as well as he has grown significantly since we moved.

anyway, here he is:

 

Impatiens walleriana (Busy Lizzie)

 

thank you!!!