How to say “I want to talk to you about many things”

Question

I'm not sure how to say "I want to talk to you about many things", is 「/Name/に話したいものがたくさんある」okay?

Answer 1

Your attempt is already good, but you have to use こと instead of もの because a topic of a conversation is not tangible.

I want to talk to you about many things.
あなたに たくさんの ことで 話をしたい。

There are many things I want to tell you.
あなたに 話したい ことが たくさん あります。

Answer 2

depends on who/relationship but, I would just say something like ; いろいろを話したいな。or いろいろを話し合いたいですね。