How do I pretend that I'm actually genuinely highly appreciative of this,?

I'm suppose to see a psychologist once a week but I could only afford 1 session per month at the $180 rate. My psychologist then later gave me a permanent special rate just for me at $85 per session and joined medicare so I could then get a rebate meaning it only costs me $0.20 each session. This is a tremendous thing because now not only can I afford the treatments I need also have over $150 each month in my pocket that could definiently be used as I earn under minimum wage and have other medical expenses I really can't afford. But I don't care even though coming across this kind of generosity is extremely rare. I just see it as just is which is kind of weird because that how I tend to see negative ****, just is but this is positive and yet I view it the same way. I know it's futile to try an force myself to give a **** so how can I fake this other then a simple useless thankyou which I already did.