Forgiveness

Over the past year, I've been working really hard on improving my relationships with other people. Whether it be with my parents, boyfriend, or friends. It's been tough, sometimes more than others, but little by little I'm improving. Yet, no matter how much I improve, there's still one area I have not...forgiveness.
Now, don't get me wrong, I do forgive, very easily. As a matter of fact, I'm known to give out second/third/fourth/etc. chances WAY too easily. The forgiveness that I struggle with is the kind that is deep. I mean, these wounds are just miles of deep pain and agony, resurfacing without warning.
As we all do, I've had my share of hard circumstances, and most, I've made it through alright. But there's a couple, one in particular, that I just can't let go of.
Everytime I think about it, it's as if the wound is fresh. Everytime I hear something about it, I just want to scream. Everytime I see this person, I just have this anger that builds up inside of me. It's not that I think this person is the most horrible on the planet, it's just, what they did to me just..it just cut to deep.
I feel like I have forgiven them. But I find myself continuously fighting away the feeling for revenge. I always win the fight, but the feeling just keeps resurfacing. And it makes me question, "Have I really forgiven them?"
I've prayed and though most of it has healed, I still struggle. I hate the feeling that it leaves behind and I just want to move on. I hate holding on to things in the past, but I can't seem to shake this.

As I continue to pray for a humble and forgiving heart, please keep me in your prayers, as well. I'll really appreciate it.