I, a 19-year-old male, am starting to feel unsure about whether we really connect [20-year-old female].

I'm feeling increasingly uncertain about whether we can continue living happily together due to our differences. We've been together for about 19 months, and have lived together for around 14 of those months in Germany. Recently, I've come to realize that we really don’t have much in common. Our views on various issues—politics, religion, society—are almost completely different, which leads to frequent arguments. She has been diagnosed with borderline personality disorder and depression, and has been on sick leave for the past year while I work full time as a mechanic. Despite my demanding job, I often find myself doing more around the house than she does. This, along with her sometimes rude behavior (I'm not sure if it stems from her condition) leaves me feeling undervalued and disrespected. I've nearly considered breaking up about three times now, but each time there have been moments where she’s done something that truly touched my heart, giving me hope for our relationship in the weeks that follow. However, this cycle feels endless. Her frequent outbursts, mood swings, and unpredictable behavior are taking a toll on my mental health. It’s hard to determine if someone you love is causing you pain, and it’s increasingly affecting my confidence in our love. I genuinely care for her and don’t want anything bad to happen to her, but I can't help but worry that our relationship is destined to end badly, largely due to our differences. I sometimes think about the future, imagining us having kids, and how our contrasting ideas about parenting could drive a wedge between us, potentially harming not just our relationship but also the well-being of a child. I feel so conflicted and unsure of what to do. Should I hold on to hope and believe that we can work through our issues, or should I surrender to my fears that our relationship will inevitably deteriorate or come to an end?