Boyfriends daughter

Lxxg • 💁🏽
So how quickly in your experiences have you fallen in love with your S/O child or children? & actually say it to them. 
I've been with my boyfriend for about a year and his daughter is often around (she's 9 now & I've known her since she was 7) we spend a lot of time together and do stuff even without my boyfriend around. There have been times where I thought I loved her but I don't think of it often and I have yet to say it to her. I do a lot for her though, so I suppose she probably can feel that I care for her. any experience you ladies can share would be helpful! :)