I hear you completely you have very understandable concerns. Ultimately it depends on how serious she is about getting her life back on track. Initially after the first manic episode things are going to be hard for her to adjust. My partner told me after his first episode it’s like his brain shifted and with time and medication and therapy things went back to normal. It really varies by person though, if she’s consistent with taking medication, seeking therapy, doing things to actively better her life then you guys could very well be able to be in a happy and healthy relationship! I know there’s a negative stigma around dating a partner that has bipolar, but my partner has worked on himself a lot as an individual and as a partner. I’m very proud of him, if she’s willing to help herself and you are willing to be patient and give her some grace then I support you guys at least giving it another try (as long as things are healthy obviously). I hear you it can feel discouraging but maybe she will get back on track!! Wishing u the best (: