Need Advice , What should i do ??

We were together since school, half of the time in LDR, been with her thorugh her tough time, she changed courier and helped her through that time, despite her own parents resenting her, she was in depression and became toxic but i was always there . Now we are both 26, her parents are looking for groom, she made it clear to me we don't have any future together, In looks she is Very Beautiful, i am average. Financially my family is better than hers and personal courier wise she can't even survive on her own money, Got her first job 2 months ago and suddenly she is just looking for other people attention. What i want to say is i did more anyone could have done for her, supported her financially and emotionally, but in the end she wants someone more richer, my height is 5ft 6 and taller , and her own own brother wil have love marriage , but her parents won't allow her. I cried, it has affected me mentally, someone so close can become so ruthless just because she is getting better options in so called rishtas. Maintained my distance, stopped taking her calls, she came to my city we were staying togther for 2 days and now she wants to talk to me , looking for rishtas and flirting with other boys. What makes me feel like hell is how could i have been in love with such a person and couldn't see it.