Emotionally stuck

When I was still in grade 7, I was just a normal guy with a normal life, that was until a cousin of mine contacted me asking me to join her group participating in a math festival, logically I joined. That was where I had met her. M. A tall, smart and pretty girl who was just 1 grade above me (grade 8), the first time my eyes lay upon hers, a warmth spread through my chest, a sensation I haven't felt in years. I had fell for her that day. Throughout a week, my cousin would constantly try and help me with her. Tho I always declined. Till one day when I saw her messenger note. It read "Growing feelings (green heart boy) and as far as I knew back then, I was the only one who used green hearts. I had recently used a green heart to react to her messages before she posted the note. I shared this to my cousin and she was ecstatic. Throughout several weeks I would slowly grow my relationship (MU) with her, it was perfect, life was perfect. Until she ended it. She wanted to chase high school before any relationship. That was 3 years ago. To this day I wait for her message "Right person wrong timing" to turn into "Right person Right timing" who knows how long i'l wait. A year. A decade.