If he truly loved you, he would have waited until the end of time for you to convert, if that really mattered to him in order to marry you. There would be no other option for him, it would have to be you
As a PP said, he just sounds controlling. He wanted you to change for him, he told you to jump, and you didn't ask 'how high'?
I know more than anything that right now you will struggle to see how bad this person is for you. But please, please, take a huge step back. Do not chase him. Do not 'beg' for his forgiveness- as you've done nothing wrong.
He seems to have moved on from your relationship as quickly as you would move on from ordering from your favourite takeaway if it turned out they were closed.
If you push and he 'comes around' and takes you back, your life with him will be miserable. He will use the fact that you made him wait for an answer whenever he wants to get his own way. Nothing he does will ever be good enough.
And also, here's something. I once had a Muslim man interested in me. I am Christian. I told him I would never convert to Islam. He told me that is not a problem - that if the man is Muslim, he can marry a woman who follows any of the major religions. Now I'm not sure exactly how true that was. I never wanted to pursue anything with him. But can you see the difference? He was willing to make an exception for me!! This man doesn't want to do anything for anybody.
Find somebody better for you xx