What do I do here?

I have a friend, let's call him James. James moved to my city at the beginning of my freshman year, and in the second semester of freshman year to the middle of sophomore year we were really close. I think. We would crack jokes, we hung out, we laughed and cried together, we had special moments that felt like a movie. And yeah, honestly, I was pretty in love with him. Once or twice it felt like he liked me too. He was the first person I was ever in love with. I'll never forget who he was in that time.

But in the middle of sophomore year, James moved back to where he came from. We still occasionally exchange words on insta, but it's never been the same as it was. I've only seen him once since then, and it's been a year, even tho he only lives about an hour away and I go to the city he lives in frequently because my grandparents also live there.

The time I saw him, he was babysitting his two younger half-brothers, who are both really kind and smart, but are living in kind of a terrible situation with some questionable parenting and tbh a shitty brother. He treats them like crap. But while I was there, I sort of took over babysitting because it's sorta in my nature. They each showed me their rock collections, which was kind of random, but also they're just little kids and we all collected stuff at some point. I promised them that I'd see them again, and when I did I'd bring them some rocks to add to their collection. I went home, and bought them some cool rocks. That was six months ago. I have no idea if they remember me at this point. I hope they do. I've always wanted to be a cool aunt.

But here's the issue. I was supposed to see James this weekend, tomorrow actually, but he last minute bailed on me. He's bailed on me several times now, and honestly I don't think he actually cares about seeing me. Obviously there's way too much context to reasonably put in a post here, but I suspect he's kind of a narcissist.

I still have the rocks for his brothers, and I was going to give them to them tomorrow, but now I can't. His parents don't know me, but I was considering just mailing them the rocks as a Christmas gift, kind of the cool estranged aunt vibe. I don't know if that's weird, and tbh writing it out it feels really like a strange idea, but I can't help wanting to fulfill my promise to them I made six months ago.

So, to the forum I basically use as a Reddit board since Reddit is blocked on my computer, help. What one earth should I do here? I don't want to be weird but also I do care about James and his brothers.