So, is blowing of the ear a no no? What about walking fingers over the tummy?

Blowing ear thing can become annoying. Do it at your own risk.
As for the other one, it's ok. I guess..
Also, I had another question. How do you know if a girl likes you despite they have a bf (especially if she liked you before they became a "thing").
What? That's hard. You're saying: ''how do you know if a girl
liked you before she got a bf?'' Well, I don't know. She'll probably tell you if she breaks up with the current bf.
Another thing, we talk about fashion and clothes a lot. It's takes up the majority of our conversations. She always asks me how this or that looks. How it looks on her. Is it her style? Does it suit her. Would it fit. How am I suppose to know. XD
We will be like looking up stuff from yesstyle and she'll ask if how this looks on her. We go shopping, she asks me if its cute, should she get it, etc. What does this mean? Can a guy/girl close friends relationship be like this or does this mean there is more to it?
It's a good sign. It means she likes your company and likes to be with you doing things she loves (shopping).
Potentially there could be more to it but just see how it goes.

I sounds so far so good to me.
PS. Do you guys think I should open my old thread since I have so many questions?

I doesn't matter. Ask all your questions here. It's easier for us to answer everything in
one thread.
Most girls come by here anyway. Unless you insist on having your own thread.