Lunch

A: why are you so sad
B: I did something I regret

A: what?
B: I let my uncle pay for lunch

A: so what?
B: But he comes all the way from Europe

A: oh.. you're too sentimental
B: I just feel bad

A: gee, that's easy to resolve
B: oh... what can I do?

A: imaging that i am your uncle
B: but you're not

A: do you wanna resolve your issue or not? dude.. :)
B: yes...

A: ok.. follow what I say
B: ok   (reluctantly)

A: I am willing to forgive
B: ok.. I am willing to forgive

A: (look at B in the eye)
     You're forgiven
B:  I am forgiven..

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Sometimes, a small thing can overwhelm some people.
The thing is that it is already in the past.
It's probably easy to say we just move forward.
It might be better if you find a solution that resolve this issue.