HG, You are all over the board. I would strongly suggest finding one place to post so that is it easier for everyone to follow you. As far as the hugs go......go with what works, but don't over pursue. I have read your other posts and a lot of things you noted sound so familiar. We are just friends and so on. If your gut says there is something going on beyond friendship....I would say you are 99% correct. Friends hang out, but till 4 in the morning is excessive. The statement that a friend is always there with them sounds like misleading speak to me also. More like a cover up.
What does your gut tell you is going on?
I would highly suggest stopping the snooping on her emails. I know you want to know, but she can see that in so many negative ways. Even if there is nothing going on, she will see it as controlling behavior which isn't good for any relationship.