I've fallen hard for someone but things aren't working out. Need advice

Assalamu alaikum, I'm really struggling with one-sided feelings for a guy. I've been making dua nonstop, begging Allah to bring us together. He's my second cousin, so we're related, and I've liked him for over a year now. I've made every dua I know, but it's like the doors just won't open. I keep hoping we'll bump into each other at family events, but it's like the timing is always off. The weird part? When I go to a gathering hoping to see him, he's not there. But when I decide not to go thinking he won't show up-he's there. This has happened so many times, and it's messing with my head. I spend all my time thinking about him, making dua for us to meet, getting excited for events, and then feeling crushed when nothing happens. It's so draining, honestly. I've also made these long, heartfelt duas asking Allah to make us the best spouses for each other, full of khair and barakah, with love and peace in this life and the next. I've prayed for us to be together as husband and wife in dunya and in Jannah, but now I'm just exhausted. This is the first time I've ever felt this strongly about anyone, and letting go feels impossible. I've done Istikhara, I've tried everything, but I'm so tired. The anxiety and sadness are really affecting my mental peace. What should I do? Should I keep making dua for him, or is it time to let go and leave it to Allah? Also, if anyone knows any special duas or ways to please Allah that might help, please share. I'm ready to try anything.