long time obsession with acquiring Halo kit
Possibly he should have maybe spent more time with his partner than obsessing about a game and she wouldn't have gone elsewhere.
There's nothing worse than splashing out on a hugely expensive engagement ring only to be dumped before you can drop to one knee. When such tribulation was bestowed upon Halo fan Eric Smith, though, the traumatised chap wasted no time toughening up. Smith flogged the lucrative piece of jewellery and bought himself a full body …
If you don't have interests in common with your partner, you're probably not really suited to each other. If you can't tolerate those interests of your partner that do not coincide with yours, ditto.
FWIW, my current partner likes to play computer games, as do I. My ex liked to talk about shoes, a lot, despite my repeatedly making it clear that I had no interest in such things. I had no issue with her obsessing about shoes, but I didn't especially want to have repeated lengthy conversations about them.
but surely, every time he looks at the armour, or re-tells it's story, he's going to be reminded that it was paid for by the engagement ring he didn't give his GF.
Not sure what I'd do with the money in that situation, I guess anything you'd buy with the money would have the same problem attached to it.