Friend's friends

It is hard. "Friend's friends". Because I don't want to be rude to them because I care about my friends. But I don't know how much I should be nice to them. They are my friend's friends , so of course, they are nice too. But I just don't know. You know what I mean? I guess I just think too much? Or is this " Japanese thing"? Whatever that is, I just get confused. Can I go out with them? Should I report about it to my friend? Even we just go out? I don't even know we go out as a date. Let's say I went out with my friend's friend. And maybe we kissed, but nothing else. Myself didn't even know what is going on, then that friend asks me"what is going on with my friend?". All I can say is "Nothing. We just hang out" I am sorry. I don't think I am lying but nothing is happening. you know. Things happened but nothing is happening.
People always like to know about everybody else's lives and judge them. I hate it. It is so nosy. But I can think it in this way. My friends worried about me and tried to protect me or something? That can happen.
All I know is, I need someone that I can feel comfortable to be with. I am extremely shy and nervous. Trust me, already! I am. Please do not say I am not. Because I am. Therefore, I already pretend like I am fine, but actually not. I am almost having panic attacks all the time. When you see me breathing weird, that is the sign.

I just miss my friends. That is all.