How do I say looking forward to being with you in Hawaiian?

There's no direct, idiomatic translation of "looking forward to being with you" in Hawaiian. However, here are some ways to express this sentiment, depending on the level of formality and the context:

Formal:

* Ke kali nei au e hui hou me ʻoe. (Literally: I am waiting to meet you again.) This is a formal way to express anticipation.

* Ke hauʻoli nei au i ka noho ʻana me ʻoe. (Literally: I am happy to be with you.) This emphasizes joy and anticipation.

Informal:

* E kali ana au iā ʻoe. (Literally: I am waiting for you.) This is a casual way to express anticipation.

* ʻAuhea wau e ʻike hou iā ʻoe. (Literally: Where will I see you again.) This implies excitement and a desire to see the other person soon.

* E ʻoluʻolu loa au e noho pū me ʻoe. (Literally: I will be very happy to be with you.) This conveys joy and eagerness.

You could also use a phrase like "Ke hauʻoli nei au e ʻike iā ʻoe," (Literally: I am happy to see you) followed by "I ka wā e hiki mai ana," (Literally: In the future), to express anticipation for a future meeting.

Remember that the specific phrase you choose will depend on your relationship with the person and the context of your conversation.