I understand what you want to say, but I'm worried that your current behavior is going to leave you ostracized by everyone else.

First off, we're your friends here, so you should get to know us better. The word for "friends" here is "nakama" which is much much more close compared to "tomodachi". It's like comrades in arms or some sort.

It's not too late to start from there.

If you're troubled with something, don't feel like you have to handle it yourself. Come to me instead. Whatever it is, I'll help you.

Because you aren't alone-na. Can't shake off the "na" ending. It indicates that Nagatsuki is saying it as stating a fact that not many knows of.

...I wonder what this sensation is.

This feeling... It's like...

Excuse me...

Can I call you "onee-sama"?

...Huh?