Yeah. The gift was great; the conversation wasn't so good. You're supposed to look like you don't care what he does. Trouble is, you seem to be sinking into a depression.
My H says stuff like that to me. That I don't say things the right way. That really gets my goat. Then I say that if he wants me to read from a script he has to give me the script. If not, I'm just going to come up with my own answers to the questions. And I'm just as entitled to come up with my answers as he is to say things his way.
You don't want to nag him about this stuff. It looks like you and he are really active and do a lot of fun stuff together. You're not the "lets sit around and talk about us" type.
I would try not to mention Retro for a week or two, at least not til August. Then when you feel you are ready to book it, ask him again. Maybe if you tell him that you feel you are not dealing well with the situation as it is, and you feel a need to learn to communicate better so you can figure out for yourself where you are in your life. And ask him to help you by going to this with you, because he is an important part of your life. You need to be careful not to get depressed over this. A lot of people on this board highly recommend anti-depressants. I don't know if you have considered that.
Just an idea. You know what he is most receptive to. But I do think you need to avoid letting him feel like you have your finger poking him in the back, saying "Go to Retrouvaille."