You could talk with him about it. [Before...] You didn't... have to be alone. You could be yourself with him. [Thinking about the memory they both saw when they went to the zoo, before...] You didn't have to pretend to be a fool with him.
[And he should be happy that you had that -- even if it didn't last, obviously. And he should be sad for him that it didn't and yet-- all it does is leave him angry and hurt and jealous and sad.]