How about

"I really like you, and I think we'll do together in the long term. You're kind of cute, too, and I see us being able to have a mutually fulfilling life together. Yeah, I think you're someone I'd like to be with, be good to, and invest romantic feelings and strong emotions with. I see us going down the same life path, and I see you as being a good life partner for me - and I think I'd be good for you, too. I'd like to love you - how do you feel about me? I'm up for giving this [love] a go..."

It's flowery in its form there, but, something like that seems a lot more applicable than me saying just "I love you" or "I can't live with out you".