Words of encouragement?

I'm (hopefully) going to leave my 6 year long relationship tomorrow. He's so controlling and I've been so unhappy for the past 3 years. I've wanted to leave but never felt like I could. Something clicked in my head within the past two weeks and now I feel like I'm ready. But I keep second guessing myself. I dont want to keep pushing this off like I have been for the past few years. I'm just so sick of being unhappy and contained.

Please leave me some positive messages I can come look at when I'm feeling like I want to give up. Maybe share your story about how you left your relationship and stayed gone. We have a son together so I can't totally cut him off. I just know he's going to try and guilt trip me into coming back.