Many times he/she is not happy but just hanging there waiting for better days. It's like... don't you want to be happy?
My friend told me like 'hey, you wouldn't like someone flirting with your girlfriend?'. But that's not going to stop even if I back off

He pretty much told me that I'm an asshole.
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From my experience they always do. Maybe I just find the wrong ones all the time
Friend zone is horrible.