I'm filling out my fafsa thing and I have a question?

My boyfriend has been living with my mom and I since January and I was wondering, the question where it says "The number of family members (household)" would my boyfriend be considered a family member? My mom said not to put him because he isn't a dependent of hers, but he lives with us and isn't moving back to his mom's house anytime soon. Another question I guess, can my boyfriend still use his mother's info for fafsa even if he doesn't live with her?