I constantly cant approach when I see girl that I like and in that time I dont have any excuse, I just cant approach. Did someone experienced this before?
Are those some of my subconscious thoughts and believes that I'm not conscious about or is it something else? I would really appreciate if you help me.

It's called approach anxiety.
Say hi. No need to talk about meta-physics.

In a club/pub I try to put on the mindset that people go to meet other people. If they don't want to be disturbed, stay home.

Take it by baby steps, first just go to random girl/girls and say "Hi!" for no reasons. Let it be super awkward and then see it as a lesson learned.

Next you do the same thing but add " Hi! How are you guys doing?"

Do it and fail a few times you will no longer care about it, and the anxiety will be gone.

You can practice on anyone don't just go for people you are into, take anyone you see just for the sake of learning this.

In a daygame i have no clue.

I'll try that, thanks for the advice.