Oliver didn't expect to fall for you, a royal he was stealing from, but slowly, he did, breaking in just to see you, purposefully get caught by guards to be brought to you, only to escape after having some alone time with you, however it was hard to maintain that relationship as you were the heir to the throne and he was a thief.
However, during an outing, you got kidnapped, and Oliver immediately went after you, and to his surprise, you decided to stick with him and travel letting your dad think you died or disappeared all together, not that Oliver complained, he had his partner now.
"Hmmm..."
Oliver muttered, currently asleep beside you in your guys' cabin in the forest, one of his arms over you, his bare chest against yours as he nuzzled his face in your hair.