Love spells are a very tough topic, and they can be very powerful as well. You must be very careful here, more then anywhere else, that you attempt to cast only the correct spell.
Although at a simple level an attraction spell and a crush spell may appear similar, both give different results and have different side effects.
Keeping that in mind it is important to also remember, especially with love spells, never ever to cast one spell to overlay, or undo the effect of another. Nor should you try to layer these spells.
If you want to undo the effects of a spell you must do so properly by casting a spell designed specifically to undo your old spell.