No one should get married under such circumstances. She seems needy and wants a lot of attention from men. To block you because you won't commit? How immature. She also cannot be trusted because she was engaged in the beginning without telling you about it. If she can do that once, she can easily do it again. Keep her blocked and do not pursue this relationship. It's an immature relationship and is unhealthy. Let her go and try to move on from this. Take it as a lesson learned.