would God forgive me if I slipped up?

Ok, Christian, serious answers only. I struggle with masterbation and pornography, I got really sick for like a week, and afterwards because I hadn't masterbated or looked at porn in that time, but I slipped up a bit ago and prayed for forgiveness but...after i got sick and prayed a lot i had a peace of mind that's so wonderful and I know God gives it to me, and while I was having my problem I couldn't get it from praying no matter what, but while I have it I feel mentally active instead of groggy like before, and I feel so much better, like God has forgiven me and like I've been cleaned but....I struggle with keeping away from porn and masterbating but.....would God forgive me if I slipped up? Would he take away the feeling of peace, like he did before? I just want to keep the feeling because I feel spiritually awakened and can concentrate like I used to be able to when I have it. Advice? Would he forgive me? Would he take it away?