Is it normal for guy friends to do this?

I have a guy friend who teases me a lot, sometimes there is subtle flirtation here and there but generally we're close friends.

There's a girl that he is interested in but for some reason he is not pursuing anything with her. The girl likes him too. However, he claims that the wants to work on himself in the meanwhile and that his not ready to be in a relationship or mess her up.

Out of curiosity is it normal for men to flirt, be playful with their female friends whilst they have an interest somewhere else?

Why do this towards me, if he has his interests somewhere else or does he not respect me enough as a friend?

Is it normal for guy friends to do this?
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