How come when i like someone a girl ALWAYS intervenes and she takes the guy?

And surely you are aware that when a guy takes after another person while he’s already in a relationship that he’s not capable of making good decisions and not worth your energy or consideration because he’s just going to do eventually what he done to you to her so you deserve much far better and should set your own priorities and standards higher than to want a guy that would fall for a tramp outside of the relationship anyway.