My start of reboot

I've never viewed myself as a porn addict, but now thinking about it, I really was.

My realisation of a problem started when I couldn't keep my erection just before the sex with my girlfriend. To be honest I'm still feeling really frustrated, as I never expected that my brain is going to betray me in this way. I'm not sure how to tell my significant other about my problem, but I'll probably will have to at some point as I don't want her to feel frustrated why I was so hard when we were cuddling and suddenly after we moved to sex, I'm soft as an unprepared sausage...

I really don't know what I should do at the moment. Sorry about this incoherent rant, I just needed to let it out of my mind