help please

i’ve been doing so much better than i did before, i used to be going at it at least twice a day, but now im going maybe once or twice a week, but it’s still so upsetting because ive got a gf that i plan on asking to marry me soon. i wanna be porn free before i can let myself to that. i do good on the weekends because we’re together the whole time, but when monday comes it all falls apart. i drop her off at work at 5 am then sit in the parking lot until 7 when i go in, sometimes i can do good, but other times even the slightest trigger sets it off. i don’t have anything to do between that time considering how early it is. just sitting in my car with nobody to stop me and this is basically my only weakness here. ive been listening to a podcast about quitting, and its changed my way of thinking for sure and i know ill be able to quit. but these relapses really hurt, and i dont want to hurt my gf anymore.