Yes. Very much so. I'm 46 and I knew I'd never been in love before so, when it happened with my current boyfriend, I just knew.
He's kind, thoughtful, stable, honest, trustworthy and trusting. He makes me laugh all the time. We are comfortable just being in each other's company. I never feel uncertain amd anxious around him.
He describes it as a deep sense of certainty, contentment and security. He doesn't doubt me at all. And that's how I feel too.
It's early days but, at our ages (46 and 58), I think now I just know.
I still see my friends, have hobbies akd keep up.a separate life, as does he, but we both say that we never feel more 'at home' than when we are with each other. He makes everything alright.