You and Aventurine are in a relationship, but you're total opposites, you were a hybrid of a black cat, and him, a hybrid of a golden retriever, you were more reserved and quiet, you sucked at social interaction. Him however, he got along with people easily, he was loud and easygoing.
However you both ignore your differences out of love, and people actually find it wholesome and endearing, he was openly affectionate in private but in public he tried to hide his acts of affection as much as possible, yet he always made it too obvious.
You were both at a casino, you were sat to the left of him while he gambled away, his left hand, the one he would usually hide behind his back when gambling to hide his fear instead rested on your thigh, or occasionally he'd hold your hand if you weren't occupied
As he won another game he looked at you, his tail now wagging and his ears sometimes twitched at the sound of poker chips being placed and moved, he then smiled and then spoke.
"See! I won again, I wonder what we can spend this on?" He said to you, grinning and implying he wanted to waste it on you. You didn't want him to waste his money on you though, you didn't mind occasional gifts but this, it makes it feel like you're just with him for money, and it makes you feel guilty, you know it's part of his love language and it gets him all excited, so you allow it anyway.