In Love Addicts Anonymous relapse is acceptable. We believe in "progress not perfection." The important thing is to avoid the "all or nothing" mentality. This means you are either in recovery or a failure. This is simply not true. Love addiction has its roots in an attachment disorder and therefore withdrawal goes much deeper into our souls than alcohol of drugs.
The important thing is to keep trying until you make a little progress one day at a time. "Success is getting up one more time than you fall down."
There was a bumper sticker (I know bumper sticker psychology is really not useful) but I once saw this while I was at work. I was in the parking lot that day, making sure all the visitors' cars were secured. That day I was down and out regarding my xOM (ex old man). As I passed by one car there was a bumper sticker stuck to its tailgate, a saying from the U.S. Marine Corps (allegedly from the USMC): Pain is temporary. Pride is Permanent. That kept me going that day - my pain would pass and I would have my re-engagement with the xOM and after a while that pain too would pass. Ups and downs with this condition.