there's plenty, it just depends on a few things
a. are you casting correctly?
b. does the spell have the right ingredients [like a pink candle not an orange one]
c. is the time to cast correct? [moon phase/date/time]
c. is the person straight or gay?
love spells you cast over another needs to overpower the persons free will, so they're tricker to cast, and normally don't stick. a spell to just have a dream guy [not a specific person] to enter your life has a greater success rate since you're not casting over another. rather, you are asking the universe to bring someone you were already destined to meet into your life sooner.
if you don't charge enough energy, or focus on the single task while casting, the spell usually fails because it's not strong enough and not focused on a singular goal.
if i were you, i'd go for a spell to attract love, but not specifically a person, better karma, and greater success rate from what i've noticed.