My husband and I were slow burners. I can't even tell you when the love started.
My relationship with my first husband (10 years) was based on my limerence, which I didn't know existed, and I though that was what normal love was supposed to feel like.
So when I met DH 2.0 and didn't have that level of crazily intense feelings, I thought it must mean we had no real spark. But I liked him a lot as a person, he was outgoing, kind, funny, gentle, intelligent, philosophical, listened as much as he talked and the sex was good. So I kept chugging along getting needs met and not worrying about the future. Until one day I was chatting to a mate and she said "do you love him?" and I said, "yes", then nearly fell off my chair in shock . Because it was true and I had no idea when it had snuck up on me.
We've been together for over 20 years, we have an 18yo son, we still begin and end each day with "love you".
I didn't know love was supposed to be like this. That it was something that started with non electrified like. A like that was nourished into the development of love with consistent positive interactions, and no shadows of lurking conflict. Mind you I didn't even know that over time love is something you could rely on to sustain, to wrap itself around you with a comfortable warmth and consistent caring. Rather than throw you up and down like a crazy, sometimes anguished, sometimes ecstatic, roller coaster.
Which might be why I didn't recognise the seeds, or notice the spouting until it was well into being in bloom. Which must have taken at least six months, perhaps nine. I don't remember when I had the conversation with my friend, but DH and I had been together for a decent chunk of time by then.
I didn't just "not know", I was pretty firmly in the "this is for now, not forever, he's not the one" camp. But to be fair I was a terrible picker. If I had instant, giddy attraction it was invariably for somebody who had a track record for being Very Bad News for the women in his life.
I sometimes get the cold sweats because I'd love to say that I had learned to chose better for myself when I met DH. But it was pretty touch and go because I was semi-consciously still open to "has sparks" better offers should they have wandered under my nose. I didn't have an iron willed "I will stick with this and compromise because it is safe and healthy" thing going on. I just managed not to come across somebody bad for me who made me feel sparks in the timeframe. I could have so easily let this enduring, happy, funny, warm love slip through my fingers (and take the family I have with it) cos ... "electricity".
There but for the grace of god and all that jazz.