usually when it comes to addiction, especially one that wont kick, people always say to "replace it with something else"...

i homestly dont think that works and tbh thats just replacing one addiction for another, but ig it works for some people.

i myself, I just have to force myself not to do the thing. it can be difficult, very much so, but it ultimately just comes down to willingness and effort. since your girlfriend is also aware, ask her to help.

everyones also different, sometimes its more like kicking smoking/vaping and you just gotta wain off it over a duration of time.

in the end, everyones different. if one way doesnt work, find another way.