Hey, I'm an Infp 4w5 sx/sp 459 aswell.
I am also researching about this specific personality since I feel like it's a bit uncommun ?
So basically I'm the typical 4w5 INFP who is withdrawn, brooding, reserved and highly introverted. I would not consider myself as shy (maybe because of the sx dom) but as
@secondpassing said above, I have a lot of social anxiety. Sometimes I even ask myself If it's not even excessive to be normal (like I've never met anyone who seemed to be this anxious). Like externally nobody will see it but internally I can definitely feel that I'm very nervous. So yeah, externally i'm very relax and calm, almost expressionless but internally I'm always feeling something intensely.
I am easily irritated when I'm in a bad mood. So I will appear cold and unfriendly with a very brooding/angry face and will whitdrawn myself instantly (I feel like this brooding face is more persistant to sx dom than any other subtypes but I may be wrong).
So yeah, I'm someone who is fastly irritated, triggered but I will never engage in conflict because I know I will be overwhelmed by my emotions. So I walk away while still angry.
Sometimes I even ask myself if I'm alive because sometimes I just don't want to do anything and talk to anybody. Just want to be there, with myself and my thoughts instead of speaking with even a close friend.
Since I'm sx, I crave for meaningful relationships. Sincerely I think it's one of the only things that make me feel really alive/energized. But I struggle a lot to be close to anybody because of my triple withdrawn nature. So yeah, it's an internal conflict that is really painful to deal with.
Finally, I would say that I am competitive but mostly in relationships. Like if a girl choose me over an other guy that she likes too, I will be highly satisfied. That's it lol.
Hope I could help you with my personal informations and I would be really glad to see others fellow Infp 459 sx/sp coming here to share their story and their informations