Sup im bob, and i need some help with a situation were this girl thats the most amazing girl ive ever met in my life has a bf and hes a total douchebag and asshole and doesnt deserve her but theyve been together for 4 years.
I want to know how to get out of the friend zone patiently if you know a girl with a boyfriend likes you?

So I confessed my feelings to a girl who I've become good friends with, and she told me that she likes me but also likes being friends with me and that since she's been with her boyfriend for 4 years it was either be friends or be nothing at all, and I told her that I love being around her and talking to her so I picked to be friends, but I don't want to go deep into the friend zone and I want to stay on the verge of friend zone and potential intimate relationship so that if she ever breaks up with mr.douche bag she will remember the feelings that I have for her. How do I do this? But don't come off as a complete asshole or distance myself from her so that I pretend to not know her.
Sure I want more, but more isn't possible now, and for now I'm fine with being friends cause I want her in my life in some way, she can't just break up with her boyfriend of 4 years since she's that's such a long time and it'll take time most def.
For those people who are like "oh she's awfully happy with her bf". They always argue, and been on and off for 4 years. He's a d-bag.

I texted something jokingly about him one day to this girl and he read it. So hes messaged me about doin slick shit and how if i do it again there will be problems, so i said that there wont be any problems but he better not threaten me, something like that. So i dont rly give a fuck about this kid, but he is deff preventing me from making plans with this girl to hang out. So i gotta let things cool down. But still wanna go through with showing her the better man ( me ) =] since at first we used to hang out alot and then when i met her bf he must have said some shit to her.