Lol.
#1. If you're paying your fair share, you get a bedroom for your stuff if she gets one for hers. Her parents can stay in a hotel when they visit, they don't need a special room.
#2. Your girlfriend doesn't "help" you with your fish stuff unless she asks you first.
#3. Your girlfriend doesn't dictate where you sleep! If she doesn't want to be by you, she can sleep somewhere else.
Train her now, or you'll regret it later if you ever get married.