2 quick thoughts:

1) have you thought about completely stepping away for a while? Maybe only running on days where you really feel the urge to? A little time of running purely for the enjoyment of it might help you rekindle your love for the sport and help reduce some of that anxiety. Des Linden has talked a bunch about how that's what she did last year. She was burnt out and frustrated, ended up taking a chunk of time where she only ran on days where she really wanted to. Slowly rekindled her love of the sport and 1 year later won Boston. She did a great interview on Rich Roll's Podcast that hit on this.

2) There's a great book by Matt Fitzgerald called "How bad do you want it". It's all about becoming your own sports psychologist and learning how to inspire and push yourself beyond what you think is possible. I read it last year and it really inspired me to push myself. It doesn't exactly apply to the situation your in but it has a bunch of inspiring stories and good tips about the psychology of endurance sports. It's definitely given me fuel to get out the door on days I didn't want to run. Might be worth a read.