An Aquarius once had a crush on me, but looking back the signs weren't very obvious. We were friends and classmates first and foremost, and I never saw him as a potential partner, but as a great friend. Until one day he confessed his feelings and I was a bit shocked because I never saw it coming. Things felt a bit weird and awkward after that, but we stayed friends until we left school. Decades later he found me on Facebook and confessed (again) that I was his type and that he wanted to make it work between us back then. So in my experience, they befriend you first, and then confess if they feel safe enough. And if you made an impact on them they won't forget you.