What does Judges 11:35 mean?

When he saw her, he tore his clothes and cried out, Oh no, my daughter! You’ve broken my heart. You’re the one I can’t bear to lose, but I made a promise to the Lord, and I can’t take it back. Judges 11:35 - Modern Text Bible

(Jephthah is devastated, realizing the cost of his vow. He feels trapped by his own words.)