1. 私はまだ夢を追っています。(I am still following my dream.) This expression can be used when you have a specific goal and you are still pursuing it. 2. 私はまだ夢追い人です。（I am still a dreamer.）This expression is rather poetic for spoken Japanese.) 3. 私はまだ夢を追いかけています。(I am still chasing my dream.) Similar to No.1, a little closeer to written Japanese. 4. 私はまだ夢を見る人です。(I am a dreamer.) Neutral, the literal translation of your sentence, but is not used often due to collocations. 5. 私はまだ夢想家です。(I am still a dreamer.) This exression implies that you are naive and not in touch with reality.