You are aware that I have said over and over and over that the believer who decides they do not want to be a Christian anymore does not lose his salvation until God has exhausted all his efforts he has allowed for that person to come back. If they don't come back in the time and space he has allotted he turns them over to their unbelief so that they can't come back. He is long suffering, not forever suffering. You, obviously, came back in whatever time God allotted for you to be able to do that.
The Galatians illustrate for us how God gives the ex-believer time to come back. What we don't know is how long God leaves the door open for the ex-believer to come back. I suspect that depends on the level of growth the person was at when they left, and why they left. Now that you've been down this road, I'm guessing you probably are aware that God probably isn't going to be as long suffering with you if you leave in unbelief again.