How do you say "I think I love you"?
I think it would have more feeling behind it, especially to a fluent speaker when they know you're trying to learn spanish haha.
This obviously means you are not sure at the moment but you don't want to sound clinical about it either, so I would say, Creo que estoy cayendo enamorado(a) de ti.
I'm new to spanish but i this is how i would say I think i love you
Either one of these:
creo que te amo
pienso que te quiero