Forgiveness

This is something I have been struggling with for awhile now. I can not seem to grasp how to truly forgive. It has brought me to the point of questioning my salvation. I was doing some reading on grace and forgiveness (since I slept so much during the day I can't seem to sleep now...go fig!) and I know what forgiveness is but I just don't know how to forgive. "Just as there is no limit to God's forgiveness to us, there should be no limit to our forgiveness of those who wrong us. In response to Peter's question to Jesus about forgiving a brother who might sin against him, Jesus said, "I tell you, not seven times, but seventy times seven" (Matthew 18:22). Our forgiveness of others should be as limitless as God's forgiveness is toward us. Just as God's grace and forgiveness is incomprehensible to finite mankind, so is the expectation that we can repeatedly forgive others." I know God helps us follow his commands by giving us the Holy Spirit to help and I guess that what has me questioning my salvation. I don't feel like I have him helping me but that may not be him that's not allowing it. Honestly I know a part of me wants to hold on to the anger and pain and feed off of it for whatever sick reason. I need to really give it to God and stop saying I am because I really do know I can't do this without him. There is no logical reason for me to forgive....he doesn't deserve it but none of us do and God doesn't see any sin any more damning than another with the exception of blasphemy- "I tell you the truth, all the sins and blasphemies of men will be forgiven them. But whoever blasphemes against the Holy Spirit will never be forgiven; he is guilty of an eternal sin" (Mark 3:28,29). If God has seen fit to forgive me for all my sins then I need to forgive those who have wronged me. It's so much easier said than done...I'm living proof!