The houses can help you answer some important relationship questions in regards to synastry and composite charts, whether the relationship is romantic or platonic.
1st House: Can this person help me carry forward with my identity? Can this person help me find myself?
2nd House: Can this person stabilize me? Can this person keep me grounded? Can this person provide income for the relationship?
3rd House: Can this person provide me an environment where we can learn from each other and communicate?
4th House: Can this person feel like home? Can I establish a sense of familiarity with this person?
5th House: Can this person inspire me? Can I have fun with this person?
6th House: Can I live with this person everyday? Is this person good for my health?
7th House: Can this person bring the best or the worst part of me? How does this person reflect my actions?
8th House: Can this person accept me for who I am? Can this person accept me at what I see as my "worst"?
9th House: Can this person coexist with my world view? Can this person accept my current beliefs and philosophies?
10th House: Can this person help me reach my goals? How does this person affect my reputation?
11th House: Can this person be a good friend to me? How does this person affect me in a group situation?
12th House: Can this person help me discover and utilize my subconscious? Can this person work to understand my inner complexities?