Salam Alaikum - Struggling with inconsistency in practice, need advice

Salam Alaikum, I'm a revert Muslim about 2½ years now, Alhamdulillah. My journey's been really up and down. I took my Shahadah during a breakup with my long-term girlfriend. Ironically, about 10 minutes after leaving the masjid, my ex messaged asking to get back together. At first I resisted, but we ended up reconciling. My iman wasn't strong enough then and I drifted away from practicing. None of my close circle knew I had accepted Islam. For the last two years, while still with the same partner, I've been stuck in cycles: I practice privately for a while, then I get overwhelmed, slip into sinful behavior, feel shame, and stop trying. After some months I get motivated again and the cycle repeats. None of my friends are Muslim, my dad is strongly against Islam (so I haven't told my family), and I live in a small western town with almost no Muslims. For people from my background, becoming Muslim is seen as something crazy. I've been with my partner on and off for four years and she isn't religious. When I try to pray I have to do it in secret at home or sneak it at work. I avoid the masjid because I'm afraid someone will see me and my family or partner will find out. I'm desperate to break this pattern. Alhamdulillah I'm back to practicing again this week and I really want this time to stick. Does anyone have practical advice on how I can make my faith consistent given my situation? Ways to build steadiness in worship while keeping safe, how to handle the relationship when it conflicts with my deen, ways to increase iman, or small sustainable habits that helped you? JazakAllahu khair.