Girl's Behavior

Girls, I need a little help around here. How can I know if the girl likes me? and what about understanding boundaries?

The problem with me is not myself. I believe in myself and I believe I'm different from other men, and I have a considerable self-confidence about it. The thing is...
There is this girl which is my friend's cousin. It's hard for me to tell him I like her but that's another part of the story. I met her in a barbecue gathering and she added me on insta, then I understood it was her. I didn't text her because I was still considering the boundaries. So, one day I visited my friend with brand new clothes. It just happened to remain in the room just with her and only and she compliments my whole set especially my leather jacket. Then she saw a story of me playing a song I wrote. When she understood I was the one who wrote we talked for almost an hour about this like non-stop. Other than that I see that she usually smiles when she talks to me and blushes. And she even asks about things that she heard about me, but from my friends. And she also likes EVERY post I make on insta. I have even tried to upload photos intentionally just to see a reaction... And she likes all of my photos. She thinks I'm a badass because of some things I do but these things aren't important. And I heard her once whispering my name while checking me out and talking to her friend. Should I try approaching her? And if yes, how should I do it? I remind you I'm asking only because I'm respecting the boundaries of a woman and I want her to feel cool and comfortable with me.
Updates
+1 y
Update: there is an active on-going competition but this competition is more accessible that I am to her. Perhaps if I was more accessible?
Girls, I need a little help around here. How can I know if the girl likes me? and what about understanding boundaries?
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