I[26M] am thinking about ending LDR of 5 years with my GF[27F]

We have been in LDR for 5 years and honestly I just want to close the distance asap. We have different castes. She is a thakur and I am a baniya. Now a little bit of context first, my gf father was in army and is not anymore(2014). In absence of her father, her brother in law took the charge and hence her family holds in high regards. Now her brother in law was diagnosed with stage 4 stomach cancer in Feb 2024 and since then he has been the firstmost priority of her and her family which is kinda correct. Also, she doesn't have a job and quit her preparations for her brother in law. I have been working for 4 years. We told to our families in August 2024. Her mother/family have neither rejected not accepted our relationship while my parents agreed the first time I told them which is a big surprise in itself. Her family harshly resisted initally, for 4-5 days and her mother said once that okay we'll get married to him and then things just went fucking blank. They have not discussed me for 3-4 months now and my patience has started to run super low. I asked her to let me talk to her mother on phone and then her mother said that we'll have with relatives of her side and it cannot be done aise hee. It's one thing that you are rejecting/not accepting and another is this brain dead silence. In the process my mental health has gone to shit and idk how many times I've tried to force my girlfriend to talk but she just doesn't do anything at all citing her current circumstances. The relationship has also been damaged since there is nothing else on my mind and she is just tired of me repeating the same thing. Thinking about ending things in 6 months if nothing changes. And she always says that this is not the time. I've lowered my expectations from marriage to engagement to roka to atleast meeting her family for once and none of them has happened yet. Her family hasn't even talked to me on call. I do not know what to do now. I feel so frustrated and helpless. TLDR - "LDR for 5 years, different castes. My GF's family initially resisted our relationship then went completely silent. Her brother-in-law has stage 4 cancer, so they're understandably stressed. But this silence is killing me. My mental health is suffering. Considering ending things if nothing changes in 6 months."