Not a few of us who complain are very disappointed and hurt because of endless love. They were left without clear reasons, some were openly betrayed because of other people among them.
Pain really does hurt, but whatever the power of God has written such a story, and your job is just to be patient and sincere for what He has set.
But remember wisely, that God is not only able to flip the "heart" but also "fate", then be assured of God!
Yes it might be very painful in feeling, if the love that is believed to be good and expected to last until death separates aground in the middle of the road. But you must not blame fate, because this is the best for you according to God.
It may be true at this time that you feel very disappointed and sick because of being abandoned and the like, but rest assured someday something will come to you instead which is definitely better than the one who left you.
Believe me, God is just, God is all powerful, and Allah is all wise in will. Because when you are left behind, surely God will give you a better change, because God's provisions are the best and certainly will bring you to the better.
And if you are sure that you are a good person, as well as fixing yourself with kindness and improvement, then rest assured that someone who comes later instead is a good person, where he will create happiness as a cure for all this time.
About him who you think hurts you, let God take care of it for you. Just keep your heart with sincerity, because if your heart is sincere then of course the heart that was thundering because of the pain will slowly subside and certainly be fine.
Remember, God is always turning hearts, and Allah is also turning back fate. If you are sick or sad today, you will be better tomorrow and surely there will be happiness instead.
So what about the person you think he hurt you? Calm down, leave it to God. Because all God will respond according to their actions.