I just need to vent, and this feels like a "safe" place...meaning I'm afraid that I don't get this off my chest this way I'll say something hurtful to my FI

We've been talking wedding dates, and we finally narrowed it down to the perfect and meaningful date, in a perfect and meaningful location. We decided to have it at my family's house on the night of July 3rd with a cocktail and dessert reception. Then we'd spend the 4th of July on the lake (the 4th is like Christmas for me), boating, playing games, cooking out... it was going to be fantastic. Then watch fireworks while making s'mores to end the night! It was going to be an amazing weekend.
But as my FI was telling his friend about the plan, his friend reminded him of a prior commitment for that whole weekend that he agreed to over a year ago.
I am beyond disappointed. I know that no matter when and how we get married, that day will still be special. But this was going to be perfect because he is such an introvert, this would have allowed him to actually enjoy that time. And I am so frustrated with my FI that 1.) he NEVER plans ahead, and the one time he does he didm' t remember so I got my hopes up for nothing! and 2.) He knows that the 4th of July is the one day of the year that I look forward to the most. It's hurtful that he would even make a commitment for that weekend since he knows that we always go visit my family at the lake then. And I can't ask my FI to have our wedding then anyays because then he'd breaking a commitment to a dear friend, and that dear friend wouldn't be able to come to the wedding.
Honestly, I'm just throwing a temper tantrum right now. I get that. I know I need to buck up and that in the grand scheme of things, this is nothing. And I know that we'll think of another plan that turns out to be just as special and that I'll be excited about. But right now, I feel like I won't be as excited about anything else.
Boo hoo. Poor me
