feel bad to be friendly

I starting wonder,
am i too friendly to everyone??
even stranger,
new friends,
and so on,
Is being friendly a good attitude??
I don't know!!!
If so,
should i change the way that i approach everyone??

But being friendly is the way that i respect all of them,
the way i get to know more friends,
the way i expand my network,
the way i treat each and everyone of them.

It sound like a positive attitude,
but seriously being friendly is such a way that i treat everyone,
but it seem that,
it gave a wrong message to some of them,
not only one but more than u can't think of.

How should i overcome it??
Im that kind of person that doesn't know how to say the word "NO",
i scare i will hurt them if i say so,
i scare our friendship will put a dot if i say so.

So should i not being friendly in the first place if i meet someone new or stranger??
But i think i will still be the same,
because i don't use to it,
it's the way i live my life,
so just let everything go as it come.
Living happy is the main objective i searching for in my life.