Am I in love or just attached?

So me & my fiancée have been together 3 years — got engaged last summer at my parents’ lake house, whole family was there, it felt like the right move at the time. But lately I’ve been wondering if I’m really in love or if I’m just used to her. Like, I don’t wake up thinking about her or miss her that bad when we’re apart. We live together, share bills, pets, the whole deal — it’s comfortable. But is that enough? We never really fight, which sounds good, but sometimes I wonder if we don’t because we just avoid stuff? She’ll want to talk about feelings & I shut down — not out of malice, I just don’t know how to do that. My dad never talked emotions, you know? We either laugh or we don’t talk at all. I care about her, genuinely, but sometimes I feel more like a roommate with benefits than someone head-over-heels. Is that normal before marriage? Or am I just scared? Idk — maybe I’m overthinking. But I don’t want to ruin two lives by going through with it if I’m just holding on out of habit.