Massallah pertaining to family ties

The last thing I want is to cause a problem between my father and I, My family means the world to me, but if I voice my feelings or show my discontent with this family, I think their aim is to cause a rift between my father and I.
Please give me advice on how to deal with this family and this situation. If they stay in my home, what can I do to protect it.
Shukran