Hey there, as a person who is also on the McGuire program, , I can tell you that ups and downs are normal and expected, and the program isn't a "cure" and the techniques gives him control over his speech and not cure his stutter. I wonder if this anxiety your boyfriend is having is due to decline in his speech control or due to other factors, so your best bet is to talk to him about it and be supportive of what he has to say. If it's due to his speech, then one thing that you can do is reminding him to use the technique with you ( and even exaggerate it). I'm also in a relationship with an understanding girlfriend that is in your situation. I always ask her to remind me when I start losing focus on the technique ( this could be a simple thing like you taking a deep breath, but you must ask him if he wants you to do that). You should also try to maintain eye contact and give him the time he needs. One other thing is to remind him to call his coaches and work on his speech, and maybe just give him some alone time for him to call coaches or practice. And don't pressure yourself into trying to help him, if he had success before then he will find it again, it's good for him to know that he has your support, but you don't necessarily have to do anything to help.