I want to keep telling my girlfriend about my addiction but i know its hurting her

I have been a porn addict since the age of 9 to 17 and i’ve dated my girlfriend for 5 years now. We’ve been through a lot together and held through even at the darkest times and recently i told her about my struggling porn addiction that im now fighting. She told me that i shouldn’t feel not safe to tell her about it and that she’ll be okay or when i relapse but when i do you can tell shes obviously lying and it kills her to here my relapses. I’ve only had three so far and the third time i didn’t even masturbate because i was trying so hard not to fail but i didn’t tell her because i feel like no matter what it only makes her feel worse about herself. Right now it honestly doesn’t feel like she can support me without letting it hurt her and i don’t know if thats bad of me to feel that way or not i just need some advice right now.

PS i do go to therapy once a week and she has been helping a lot with my addiction but like i said im still fighting it.