It's completely valid that you're fed up; watching someone you love surrender to their struggles for years is a draining and heart-wrenching experience, and your frustration is a sign that you care deeply and are out of ideas. The brutal truth you now face is that your unwavering support, while well-intentioned, may have inadvertently enabled her to stay in this paralyzed state, allowing her to use your presence as a safety net instead of a springboard. You are now at a critical crossroads where the kindest, albeit most difficult, action may be an honest and firm ultimatum: that you cannot stand by and watch her life waste away, and that she must take the concrete step of seeking professional help, such as a therapist specializing in speech or anxiety, to prove she is willing to fight for herself. This isn't about issuing a threat, but about forcing a necessary crisis; by making it clear that the current path leads to you seeking protection of your own mental health and quality of life, you are not devastating her, but giving her a powerful reason to choose life, for her own sake and for the future of your relationship.