history: I thought my best friend was going to be able to visit me this summer, but it turns out he can't take the time off from work right now.  I thought my best friend was going to be able to visit me this summer. But it turns out he can't take the time off from work right now. I'm a bit bummed_comma_ as I haven't seen him in a long time.
current: Would you be able to go meet him instead?
next: No, unfortunately I can't make the drive right now. Maybe next year. 