PIED in relationship

Hey fapstronauts! So I have just recently got into a relationship with someone I care very much for. And sometimes when we’re having sex, I struggle to keep it up and it also takes forever for me to finally finish. I want to get serious about recovery again, especially now. What would be the best way to go about getting help? My gf knows I have a problem but should I invite her into my life this deep and see if she can help me too? I just want to be happy and healthy with the one I love.