@ SpiritualMan you can erase certain spells. hexes, curses, luck spells. but not this kind of spell.
not sure what spell you cast, but i've come across love spells that warn if the person you cast upon were to ever find out they would hate you forever. mind you, it probably just backfired, nothing you can do. you shouldn't cast another spell, that's like throwing a bucket of gasoline onto a small fire. you should learn from this mistake, and while it hurts, try to move on. in time this person might come around, but you shouldn't force it. this is a lesson, learn from it.