If we're talking about the book 'Women Who Love Too Much', the list practically writes itself once you've been through it. The most glaring sign for me is that feeling of your entire mood being hooked to someone else's approval. You're not happy because you're happy; you're relieved because they're not angry today. The book really nails the pattern of mistaking anxiety for love—like, if your heart is racing because you're worried about their reaction to dinner, that's not passion, it's a red flag.
Another big one is the rescue fantasy. You're not dating a person; you're managing a project. You're convinced your love, patience, and perfect soufflé can fix their drinking, their career, their whole life. The book calls this 'loving from a place of emptiness,' which stung to read because it's true. You're trying to earn worth by being indispensable. I saw my mom do this for years, and reading the book felt like someone had transcribed our family dinners.
A less obvious sign is the social isolation. Your world shrinks to orbit their drama. Friends who point out the dysfunction become 'negative' and get phased out. You stop having hobbies because you're too busy monitoring their texts or crafting the perfect supportive response. The book describes it as losing yourself in the other person's universe, and the exit strategy always starts with noticing just how quiet your own life has become.