Is it possible to PMO occasionally without addiction or negative side effects?

I don't intend to be celibate, one of the main reasons I'm doing NoFap is because of the sex benefits. I recently got a girlfriend and we're taking it slow, but I want to be ready when we reach that stage of our relationship.

However I can't help but feel that not MOing occasionally may have the opposite effect, and could potentially cause increased performance anxiety. I understand that this relationship is about far more than sex and do not worry about the consequences should I be an under performer in the bedroom, but I still feel some level of performance anxiety (I believe it's a natural part of new relationships). Many articles I've read say that MOing is a way to increase how long sex lasts, and helps alleviate the anxiety.