They are engaged.

All of what you're saying about him? She doesn't care about it. Or she would have said no, and broken up with him. By getting engaged, he is including her into his family. By getting engaged, he is demonstrating a desire for commitment. She doesn't care about being in his line of women - or she would have said no and left.

She is using you for emotional gratification. If it's real love.... she wouldn't stay with someone else when there is NOTHING holding her there - and she only just recently furthered her connection with him by getting engaged.

Have you really thought about WHY she is "obsessed with making IT work" when she has someone else already who loves her? Why would she spend her time trying to make it work with him... if she didn't love him more than she loves you? It makes ZERO sense and you're unfortunately blinded to that, because you do love her.

Honestly... you deserve so much better. There are many women out there who would love you and NOT string you along like this just for the emotional gratification.