The problem with your plan is that the urge you feel will not be satiated with one girl or one experience. This is an itch you will need to scratch continuously and repeatedly. Once you cheat, it becomes easier and easier. I do believe you can eventually recover, but the risk to your* partner is higher than you anticipate. If and when she finds out by someone telling or that one time with that one girl who was meaningless and just a one time fun actually gave you an std. It’s a form of Russian roulette. I recommend against it.