system
grateful: I was really worried about how I was going to afford textbooks this semester. Well, my boyfriend surprised me and bought all the books! It's so nice to know that everything's taken care of, thanks to him.
human
I was really worried about how I'd afford textbooks this semester. 
human
Were you able to get them?
human
Yes, everything's taken care of, thanks to my boyfriend-- he surprised me with all of the books I needed!
human
That was so sweet of him! You're lucky to have such a sweet boyfriend