Most Helpful Guy
It's ok to like him and even to have hope that they will break up eventually. But please don't be a selfish ass. Don't keep trying to ruin his relationship because that's not what best friends do. If you do that, he'll end up being mad with you and for a good reason.
Now my advice is: go live your life and let the two of them have their relationship in peace. Remain his friend and don't try to interfere in his happiness. Live and let live. And we'll see how it goes in the future. If one day he ends up with you,- that's good. If not - Oh well, we not always get what we want. Just don't dream too much to the point of forgetting to live the life you have.