Why do I feel completely normal and comfortable around my boyfriend of 6 years instead of feeling "in love" and attraction?

Lately, I’ve been feeling like something has changed in me — like I have changed, and like my feelings for my boyfriend have faded or shifted. It’s one of the worst sensations I’ve ever felt. I keep thinking things like “I don’t love him like before” or “I’ve changed too much to feel anything now.” Sometimes when he calls me or makes a joke, I get irritated for no reason. I feel like I’m being mean, cold, disconnected — and then guilt crashes down on me. I remember how I used to feel: warm, close, expressive. And now… I just don’t feel the same. That makes me think: “Maybe I’ve fallen out of love.” But I’m also constantly anxious. I overthink every moment. I can’t relax into anything without analyzing if what I feel is “right.” It makes me wonder — maybe I haven’t actually changed. Maybe I’m just overwhelmed and tired from months of these thoughts and fears. I don’t know how to feel right now. I just want to believe that this disconnection isn’t proof that love is gone, but a sign that I’m scared and burnt out.

Wanna marry my partner , have no excitement feelings? Scared to lose attraction? Can’t see clear? Even though I have every right and reason to

I’ve looked at my boyfriend’s looks for so long that I really hope I value him as a person like he values me. I’ve entered into a mature love, that’s beyond feelings. But I want that attraction back like how can I grow my feelings towards him? Why does it feel so bleh or not like when I first meet a guy and I’m getting to know him? Comfortable?