Okay, so I'm going to try something different. I'm pretty convinced that saying a sinner's prayer doesn't save you. The work of the Holy Spirit and belief in Christ does, and so does Christ himself.
My questions are:
What do you mean that you lost your faith? Do you mean that you stopped believing that God, miracles, and salvation exist? Do you mean that you no longer believe in your church or your church's doctrine? Or in the goodness of God? Or, as my personal hunch is, that you are able to be a Christian yourself, due to a lack of faith or ability to overcome sin?
You mention that you believe in God, believe that he died for sins, that Christ was raised from the dead. So far, so good. But you say you're not certain you can't apply it to yourself.
To me, it sounds like you believe in Jesus Christ, but feel that somehow, for some reason, you feel like you're beyond the pale. Something makes you ineligible for the whole thing.
As a response to not loving God, the Bible says that we love God because he first loves us. In other words,
at one time each of us does not love God. Then we realize that God truly does love us, even despite the heinous things we do and the war that we wage on him. Then we slowly come to love God. That also means that for some of us, including, to be blunt, myself, loving God doesn't happen naturally yet because we're somewhere in the middle of steps 1 and 2.
It will be that way eventually. I trust that.
The essential nature of Christianity is trusting God, actually not loving God. Loving God is a byproduct of God's trustworthiness and his actions. So the question is, do you trust that God is on your side? Do you trust that Jesus Christ is real and that he's on your side and will overcome your sins eventually?
In closing, I'd like to present some lyrics, from a very popular band. It's interesting, and it talks about overcoming your past and moving forward, with the help of mercy, which comes from God.
Linkin Park said:
In this farewell, there’s no blood. There’s no alibi. ‘Cause I’ve drawn regret from the truth of a thousand lies. So let mercy come and wash away what I’ve done.
I'll face myself, to cross out what I’ve become; Erase myself -- and let go of what I’ve done:
Put to rest what you thought of me while I clean this slate with the hands of uncertainty.
So let mercy come and wash away what I’ve done.
I'll face myself, to cross out what I’ve become; Erase myself -- and let go of what I’ve done.
For what I’ve done, I start again. And whatever pain may come, today this ends:
I’m forgiving what I’ve done.
I'll face myself, to cross out what I’ve become; Erase myself -- and let go of what I’ve done.
What I’ve done -- Forgiving what I’ve done
Lots of people believe that "God so loved the rest of the world, that he sent his only begotten son, that if everyone else believes in him, they will be saved and will not perish, except for me. The reason they think this is because of the things they feel they have done. Jesus never said that we had to be perfect in order to be saved. He said he came for the people who needed him, not those who did not. Those who needed him were the ones who felt that they did the wrong things in life.
The truth is that the people in the Bible who were following Jesus were predominantly the tax collectors (traitors) and the prostitutes, etc. The people who had things in their life that the people around them wouldn't let them forget. Things that separated them from God, as far as they knew. Jesus came, befriended them, and told them to believe that God was on their side.
Anyhow, I'm making some assumptions here. I could be completely wrong here.