What is the dark side of falling in love?

What is the dark side of falling in love? Love is a pure thing. But It has many dark sides. In this days, love is nothing but talking to someone till midnight, having s*x, kissing and attraction. … Let me share my story here, on November 2022 a guy started talking to me on Instagram. He was my classmate and we went to same tutions… I was kinda depressed in those days so I put a story on Instagram about not being first priority to people. .. He replied me, “you are wrong. There is a person who sees you as his 1st priority” I asked “who's that? “ He replied “me” We were close friends.. And I had a li'l feelings for him. When he said this, I was shocked , confused, happy, sad everything at the same time. He finally confessed and I got my first relationship.. He used to drop me home walking . He inspired me to study hard. He helped me to get out of depression. I was changed by him. He never wanted anything like kisses, hugs knowing my insecurity…I was in madly love with him… My parents even knew about us.. Because of him I scored highest in the exams.. In 2023, he proposed me to be friends again and stopped replying my messages, as we has same tuitions, I tried to talk to him but he denied… And after 9 months of relationship, we broke up…. I felt at sea when he left. He made me strong. He was everything. I was down again.. The Biggest tragedy was my parents were quite sad about it. Now, I'm again in the darkness.. I still can't move on. I miss our memories. I'm depressed again. Love, a pure word, drowned me. I still don't know the exact reason why we broke up.. I still can't look at him after what happened..