You're a terrible person too. Why date someone you would leave so easily?

If someone did that to my best friend, their chance would instantly be 0. Not only did you hurt her by being a complete dick, it's creepy as **** to date her to stick close to another girl. Whether I liked the guy or not, if he did that Id want nothing to do with him.

In general if you do that to someone you're a terrible ******* person, but especially so when the case is between best friends. What you're doing is basically leading someone on until you have the chance to get what you actually want. You're wasting their time when they could be looking for someone that actually cares for them, instead of being with a jerk who will bail the first chance he gets. If you're waiting for someone, it's hard, by why not just stay single, or have casual things, like friends with benefits or something. If someone did this to my best friend because I was finally available, I'd tell them to go **** themselves, because they certainly won't be with me for doing that to my best friend. Then they'd be cut out of both our lives, my loyalty to her is infinite, especially to a guy that treated her like she is disposable.