Letting go of your losses is the best way to limit the risk in gambling, because if you are that type of a person that cannot allow your loss to slide, you will not be able to control yourself when gambling. In order for you to discipline yourself, you should have a gamble budget and stop gambling whenever you have exhausted your budget.
It is not compulsory for you to make profit when gambling and you should always expect more of losses, maybe, that will scare you away from gambling without reserve.
It's the best decision that we can make. We cannot have a vengeful point of view like calculating how much we loss so that we can expect that same amount will be given back to us. That's now how online gambling works especially in casino games. They just take and take and sometimes they will never really give back like RTP is not even existing.
Budgets will be very important. We cannot just keep on wasting money trying to chase the losses because it adds more fuel to that fire and we might see ourselves regretting what we had done because instead of losing just $100, we lost $1000 in the process and we can only realize that in the end. Let's not wait for that to happen.