Every spell that is not associated to fluffy buisness or fantasy has the potential to work and let you get your desire.
The love spells section is not associated to fluff or fantasy (unless something not ordinary is included in the spell), thus - most of the ordinary love spells have the potential to wrok properly.
But one thing that everybody has to remember is that even if a spell is logical and associated with real magical practices, it still has to be casted properly and correctly (with a specific level of experience and knowledge about the basics). Please keep that in mind.
This fact is exacly why i said that the spell has only some potential to work. If not done properly and correctly, the potential will get lower and lower. The same rule is connected to every action you take during living your life.
Many things are real and have the potential to work, but they must be done properly and correctly to 100% work.
So your best answer will be : Love spells are real and work if done properly and correctly.
As for the people who say that love spells are immoral, this is only a personal opinion. Though, it is really not recommended to force someone to love you and go against their free will.
But please remember : there are two types of love spells:
Force love of a specific person
You may choose to attract love / a lover and this will not be considered as going against someone's free will.
I had to point this out since not everyone seems to categorize the two types of the love spells section, and understand that there are two types of love spells. Keep that in mind, everyone.