Introverts are not lazy, they just like to take things slow. They like to savour it. Observe it. Experience it. Understand it. Rushing means they get no time to think. And when they don't get enough time to think, they keep questioning their choices. That sucks. So, slow it is.
Introverts don't fall in love, they make soul bonds. Yes they're going to test you. Yes they're going to observe you. And yes they're going to take a long time to open up and be vulnerable. But once you win their heart, they'd be yours till the end of time.
Introverts don't forget. Like never. They remember everything. What you said. When you said. And why you said it. Big & small. Good, bad, and the ugly. Everything. So if you think you can lie & get away. Trust me, they'll find you. And they'll remind you. Word by word.