Is she losing interest or something more?

She has BP I. Things were great between us until January, when she started pulling away after saying she was doubting us. We had sex days before she went silent. She eventually came back, and we have slept together a couple times since, but the push and pull has been crazy. Recently communication has been very poor - little to no texting, calling at night. It was Valentines Day and she ignored my text from the night before till around 7pm, and then briefly said "happy valentines:)" at 10:30pm. yesterday night she went out and turned her location off. she told me earlier she was seeing a friend and messaged today to reiterate that. I've been chill, non-accusatory. Now I've been ghosted since 2pm and I'm just getting tired. How do I know where the line is drawn? Is this symptomatic of BP I, or is she just losing interest? I've asked her before and she says she's just very stressed and at times, spiralling. My most recent text was asking how she's doing - she becomes avoidant when I ask. Please help!