Will his caste-conscious parents ever accept me?

I 29(F) from scheduled caste and 28(M) from OBC started dating 3 years ago. I had already seen a big family drama during my sister’s inter caste marriage but it turned out to be successful. I never hid my identity in front of the guy and specifically talked about it very early in the relationship in order to not have any issue later. The guy was extremely okay with it. More than one year into dating we told our parents about the relationship and both sides seemed fine with it. And we were happy. However, last year his parents completely flipped on the idea of accepting me when they got to know what specific caste I belonged to. I was pretty optimistic as I had already seen something similar in my family to turn out to be successful. So I thought I was the right person to guide him through this. However, months have passed and despite repeated attempts, his parents are not ready to agree. Meanwhile I kept comparing his actions and frequency of having the talk with his parents and found is efforts not up to the mark but I understand now that it was the best he could do. He has a very stressful job on top of it. So, both of us kept telling the other person to call it quits if either of us wanted to. But neither of us wanted to end it and it became a long hefty struggle. He stopped proper communication and I couldn’t handle it and it got worse. But still neither of us wanted to give up. Ultimately I talked to his mother to free her mind of any prejudice with regards to me. But she was very cold during the whole conversation. She said that her son is her pride and he’ll be dead for her if he goes on to marry me. She said that she knows her son and her son would never marry someone without her blessing and that she would never agree. When I talked to my partner, he had no reaction to his mother’s cold behaviour and instead told me to take a decision to call it off now that I had a clear picture in front of me. He says he cannot see me hanging forever because he doesn’t see his parents getting convinced ever and he can’t keep hurting them without any positive result. When I said that the fact that he was accepting his parent’s decision and not willing to try anymore made him a part of the problem and he hung up on me and we haven’t talked since. I wish we could have handled this better. Been there for each other. And even though neither of us wanted to give up, i did not anticipate this blunt and sudden end. I wish we could have still expressed how we felt for each other and moved on mutually and peacefully. But I think he couldn’t take any more pressure on himself. And he couldn’t see me suffering forever which is why he started withdrawing emotionally. I am unable to accept it still and I think i might wait for him forever.