I have stopped my anti-depressants a few times, and the time it took the depression
varied. Usually it was months, but last time I felt well for a year before the depression came back. Different for everyone.
The more we have a depressive bout, the more likely depression returns. Perhaps, like me, you need to stay on the medication for the rest of your life. Again, like diabetes, you have to keep taking the tablets, or insulin. Just accept that if you can.