I want to date with you ("Я хочу пойти с тобой на свидание" (it's a bit too straightforward and unnatural. But it seems to me, original phrase also is)
I enjoy dating with you - "Мне нравится встречаться с тобой"
Now I date with a nice girl - "Я встречаюсь с прекрасной девушкой"
I have never dated with a girl similar to you etc - It seems a bit unnatural in english, doesn't it? You'd probably say "I've never met a girl like you" which could be translated" Никогда не встречал девушки, похожей на тебя".