I'm in need of some advice, please help!

Hey everyone, I'm reaching out for some advice as I'm currently facing a challenging situation. My girlfriend (25) and I (26) recently purchased a house and will be picking up the keys in two weeks. While this should be an exciting new chapter for us, things have become complicated lately. We've been together for two years and have lived together throughout that time. About two weeks ago, our relationship hit a rough patch. We initially planned to stay with our parents temporarily, but right now we’re living apart—she's with her parents, and I'm with mine. I've come to realize that I've let some things slide in our relationship, and she has too. Our communication has been lacking, which resulted in increased tension. Thankfully, we've started to talk more openly now. Despite our efforts, we're struggling to regain the connection we once had. She has expressed that her feelings for me have faded, but she's open to giving our relationship another chance. The issue is that her doubts keep resurfacing. I genuinely believe we can rebuild, but it will require continued communication and finding joy in shared activities again. So far, we've managed to do one enjoyable thing together, but unfortunately, it didn't rekindle her feelings, which caused her to doubt us again. I've also mentioned that it may take time for those feelings to resurface, if they ever do. She's uncertain if we can return to how things were. Everything seemed fine until September, but then we faced a lot of stress regarding the mortgage and other life challenges, which we may not have navigated as a team. Has anyone experienced a similar situation in their relationship where feelings faded but they still managed to rebuild something meaningful? What strategies helped you reconnect and restore trust? I would greatly appreciate any advice or shared experiences! Thanks in advance!