Become a Muslim. Now, your problem is solved
If you truly loved him, and all you literally have to do is accept and worship God and you cannot even do that, then how did you really love him?
He is the great man he is because of Allah. You praise his parents for raising such a great man, but give no praise to the one who is responsible for the creation of his parents as well as all creation? Yet you say you truly love him?
This is a family that strongly believes that you should show love and appreciation to the one who is responsible over you. You yourself also believe that you should show love to your parents because they have been responsible over you and deserve appreciation.
Then what about the one who created them and all of creation? What form of love and appreciation does that someone deserve? And how would you feel if you have been responsible for someone and their well-being, yet that person never recognizes you or appreciates you?
If you can understand that, then you should be able to understand the importance and significance of acknowledging and worshipping God. You cannot create any order in your own life or make your own bed for that matter unless you make a CHOICE to do so first right?
Then when it comes to the order in the universe and life itself, something more sophisticated than making your bed, it must have also originated from CHOICE right?
Or do you continue to deny that creation originates from choice, despite the fact that the pain and hurt you feel right now was based on......you guessed it, your own CHOICES.
So when you ask yourself of the hurt and pain you feel because you made a CHOICE to be with someone who CHOOSES to worship God, think about the reason why you made a CHOICE not to worhip God or accept his existence and why all you have to do to regain or maintain your relationship is to simply make a CHOICE to worship God, but instead you made the CHOICE NOT TOO.
(Notice the emphasis on CHOICE, that everything around you was based on CHOICE, that your current hurtful feelings was based on CHOICES you made.......yet you deny the universe and life itself originated from choice?)
I think it is clear what you have to do to save your relationship. MAKE THE CHOICE.