Difficult with chastity

Hi brother Sam, my name is Luke, i’m a faggot and i am serving casually a gay Alpha who i met on grindr, it’s been 8 months we are meeting regularly. He takes chastity really seriously, that’s a big thing for Him. i already enjoyed it, i know it’s good for fags, but i could never go too long with it by myself. He’s pushing my limits, ordering me to keep locked 24/7 since 7 months ago, we had a few breaks between this time, the maximum i stayed locked in a row was 1 month.

The main problem is: i am able to cum caged, i can’t control myself, when i see i am rubbing my locked clit desperate to cum, most of the times i want just to edge myself and stop, but sometimes i went too far and came. i told Him when it happened and He punished me, but i can’t help myself. Do you have any advice? i know i need to stop doing it to focus 100% on Him and His needs.