Never fall in love when emotionally broken!

I met this guy during my master's program; he was six years older. Initially, we were very good friends. Our vibes, chemistry, humor, likes, and dislikes almost everything matched. I was reluctant to enter a relationship due to a terrible breakup earlier, but he insisted for a month, and I eventually agreed. Ten days into the relationship, my father, my favorite parent, passed away, and things took a different turn. I became too emotionally and mentally attached, and after some months, physically attached too. One day, he told me his parents might not agree because our castes were different. I clung to the word "might." Seven months into the relationship, we were constantly breaking up and getting back together for this reason. I cried, begged, and tried to change his mind, but nothing made a difference. All the support, love, and care I gave meant nothing. He broke up with me because he wanted to marry someone from his caste, and he did. This taught me a lesson: never love or get emotionally attached to anyone when you are already bearing the loss of a parent. You would be too vulnerable, and it would break you further if you are with someone who is not right for you.