Consequences of objectification and staring

So I have been dealing with a PMO addiction for a very long time. The biggest side effect of that has been the objectification and compulsive staring. Due to our close proximity, one of my BEST female friends became the main target of that; im not attracted to her, but at the time yoga pants were yoga pants. This continued for long enough(years) that i went past making her uncomfortable, and maybe past being creepy. The feminatzis have a term “raping with your eyes” because objectifying and staring is unwanted and are done without consent; and I feel this accurately describes my actions. (To clarify I have never physically gone near her, only staring) I now understand the weight of my actions, I am absolutely repulsed and find them unforgivable, and spent a week in depression to process the guilt. I would never allow my self to treat her like that again, but every time she looks at me she has a look of apprehension. Like shes afraid the pervert will come back, and she’ll go back to hating me for it. I desperately want to apologize. But how do you approach that type of conversation. Its too heavy to do over text, its not something you can casually bring up, and is a little dark to ask her out for something like coffee to discuss. (Not to mention i am best friends with her husband, so that would be weird) how do I apologize? We are good friends still; She has days where we are happily joking like none of it ever happened, other days not so much. Should I just stop dwelling on the past, focus on improving myself and apologize if I ever find an appropriate moment? Or should I attempt a horrible confrontation; regardless of how terrible, just force an apology, get it over with, and see how we fare after.
Any advice is appreciated