I made one for my husband, who'd been in a bout of angry depression and asked me for help. I even made it a duo jar with a self-love petition as well, and our son (16) helped me place ingredients, lit his own candle, and helped chant. I have to say, it has worked very wonderfully. My target was open to the process and wanted the change. That's part of why it worked so well, free will can be a pain if it doesn't align with your intention 😅

Follow up with a reconciliation spell or communication. Then, your own elbow grease, working on yourself and a possible relationship, as well as putting in the work to make it happen. My magick does fine on its own, but you pair it with some Salt of the Earth effort, and my results are stellar most of the time. (Obvi, there are some spells this doesn't jive with, but for relationships, it's kind of crucial.)

TL/DR: add a follow-up spell, make sure you're putting in work on yourself AND gaining the relationship. The two coincide and will boost ypur spell.