Hate that b*ch, this is not love, if you are willing to do everything to make that person yours, including to hurt them in this way and destroy their chances of been happy with the love of their lives !!!!
And i am sure God will not let such people have a happy ending, the truth will get out. Never do things like this, its not love its called been obssesed and it is sick, look for somebody else, someone who makes you feel like you would never ever stand to see them cry, that is love and everyone deserves to feel that.