I wonder if i did the right thing?

I really liked this guy. We dated few times. When i was with him, i was so happy and couldn't ask for anything. I know that there's an attraction between me and him. I know he likes me, i can tell the way he treated me, he is so loving, sweet and kind. But he don't call me that much or text me. I wrote him a sort of a farewell letter that we should stop seeing each other. I told him how i feel towards him. I think i'm in love with him. He wrote back and told me that he can't focused on a relationship.And also that his business take all his time and effort. I was hurt. I woder if i did the right thing to sent him a letter or i should of waited if our date will blossom into something. Thank you guys.