I am beacomming an introvert these days despite being an extrovert whole my life. I am 25.

I recently realize that me going to public places is nit happening anymore often and I donot find myself that excited about going out trying new places now either.
Yesterday I went to a coffee place in Johar Town Lahore where I was sureounded by some gen-z kids. Some playing darts, some of them jaming and some were sitting like hands in hands in their moment. All this happening in that only hall and I am there with my girlfriend just for the coffee. I had dressed fine and all was ok but my heart start pounding and I couldnt focus on anything.
I had been a freakin overconfident guy all my life. Me who had been participating in several speaches and debates compititions and didnt miss any activity happening around throughout my scool college and university, I aint someone who gets off the track like that.
I am not sure whats happening to me.
Should I go for therapy?
Has anybody been at a position where I stand?
I'd appreciate the comments.