All love is conditional. We love according to the values we hold.
For example a Christian who professes unconditional love is still unlikely to love the devil or his demons. They are instructed to hate what is bad. Though it could be argued that the devil portrayed in the bible is more honest than the Israelite god and not 'bad.'
But leaving the Christians alone, because they are such nice people on the whole, we all place conditions on whom we will love unconditionally. Do human parents love their children unconditionally? Or is the condition that they are their children. According to the bible, God loves those who choose to become his children through adoption based on faith is Jesus. For the bastards, those left outside, a day of fiery judgement is reserved.
I like to think that I am honest enough to admit that my relationships are conditional. To give your heart to someone is an act of great trust and must not be undertaken in a rash, careless and unconditional way.
Hearts can be broken.