Did he want to meet before gym so you can return his gadget? Did he say it’s a date? If he thought it will be a romantic date he is an idiot but some people assume if you contact them, you are into them. So arrogant

It’s hard to advice what needs to happen on a global scheme of you meeting right people but in situations like this maybe stop being too nice? You have his gadget. If he needs it he’d ask for it. He’s not asking so he doesn’t need it. Don’t contact him. Or find his address and mail it. Don’t contact people who treat you wrong