You already know what you need to do. Anyone reading this knew two paragraphs in. His addiction is more important than you are, what’s left to say? Go find someone who actually wants to be with you.
Literally a vacation to celebrate your relationship and he makes no effort to spend time with you? I agree, break up with him.
Make your own plans tomorrow. Is there a hike you want to do? Go do it by yourself. Or go sightseeing or whatever else.
Don’t beg for crumbs. You’ve explained your feelings. He heard you. He doesn’t care.
So you do you. Be busy. Make plans. Maybe you aren’t available to Sherpa for him, because you have plans.
And maybe he misses you and gets it. Maybe he doesn’t. It really doesn’t matter either way, because you will be happier and more forfilled. And will have the time to nurture your real support sustem. (Because he isn’t it.) He’s had a chance. And he’s picking his hobby over you. So you put yourself first, too.
He’s gaslighting you in a major way, the way that he’s talking to you when you’re trying to bring up a genuine issue you have in the relationship is truly disgusting. If I were you I would have a serious conversation with him about how you aren’t being respected, and how if he fails to talk about the issue in a calm and considered and respectful manner you are going to seriously consider ending the relationship (because you should, a partnership should be something that both people put work into, not that one person puts all the work into and the other reaps all the benefits and does things in the way that he wants to).
I’m honestly appaled on your behalf, imagine being told by your partner that you don’t feel valued in the relationship, and responding by berating them and calling them names like a child would
From your comments, I think you know what to do. He was more interested in working out than spending time with you. It wasn’t even like you were asking him to lay on a beach or something, you would STILL be hiking, and having active fun. It sounded like he basically booked this trip so that he could get runs in without distractions, and didn’t give a flying fuck about what you were up to.
You are at the same time too old for this petty shit, and too young to be waiting around for this dude to remember that you’re supposed to enjoy spending time with your SO