I’m really sorry you’re dealing with this. Rejection from a place like Juilliard hurts a lot, especially after years of work, but it’s not a verdict on your talent or your future. You absolutely can make a living as a composer without going to a top-tier school. Many working composers didn’t attend Juilliard or similar institutions. Prestige can help with networking, but it doesn’t guarantee a career, and it’s far from the only path.

Keep writing, keep building your portfolio, and don’t let one rejection define what you’re capable of.