How do I sexually tease my partner without being too physical?

My partner (21F) and I (20M) have been dating since sophomore year of school (a little four and half years now) and up until about a year and half ago our sex life was great. We’re both bi, into bdsm, and have a deep love for another. Since April of 2022, we’ve had sex four or five times and that’s it. Part of the issue is that we currently live with her parents due to the housing market rn. We don’t have our own room, and have simply converted the living room to our bedroom of which we spend all of our time when we aren’t working. She claims this is part of why she doesn’t want to have sex, but we have a car outside where we can’t be seen, and there is a bathroom with a closed door where we’ve had sex when she wanted to. What we really believe it to be is her birth control which has essentially killed her willingness for basically all physical intimacy outside of cuddling in bed. I’ve already communicated every problem and issue I possibly can with her, and she agrees and also wants things to be how they used to be, and will be talking to her doctor in December. I only bring up all of this because every post related to what I’m asking ends up being “just talk to them” and so I want to make it clear that we are past that step. After talking about many ways to Make her more comfortable, today we brought up sexually teasing casually, without there being the idea or feeling that this has to lead to sex. My question is, how can I sexually and casually tease my partner throughout our day to day when she rarely actually wants to have sex or be physically intimate due to her pill, but still wants the teasing and foreplay of sex.