If someone's taken: simply drop it. Don’t try to holla, don’t be flirting with them, and don’t even try telling them you have feelings for them. Just simply move on, don’t look back thinking that they changed feelings just so they can be with you. Don’t be a homewrecker, seriously. You may like that person, but that doesn’t mean you have to be all up in their relationship. Just find someone else who’s worth keeping.
Are the ones that go on and on about the most random, pointless things that you and that person just find entertaining to talk about. The ones where you can actually be yourself and laugh at each other’s silliness and non-sense. I just like knowing that someone’s willing to put effort into talking to me without getting bored and leaving me hanging.