My case is one of a kind

From a young age girls showed quite a lot of interest in me and I was always told that I was about to be a heartbreaker. That was still in primary school. So I thought that the norm was to just wait and get hit on and that really grew in me. When I saw friends of mine try to talk to a girl I thought that it was pathetic and a waste of time. So I never lifted a finger to do anything when girls showed IOIs. As a result I got my first kiss at the age of 16 and as you undestand I was left behind compared to my peers. That was mainly because of a toxic trait that I have even to this day. When a girl shows interest in me I really lose mine for her even if it was there in the first place. I really cant find the reason for that. Propably its the lack of experience and the fact that I have to step out of my comfort zone. Maybe some deeply rooted insecurity or maybe a mix of those.

Right now I am 19 yo and still not a single lay. I have really regretted the fact that I have not reached my full potential in my teenage years. My social circle is starting to believe that something wrong is happening with me as despite the fact that I am attractive(6 feet 4,blond,blue eyed) I never get lucky. To be honest I never really approach a girl because of my toxic trait that I mentioned before but even with the ones that approach me I always mess it up.I consider myself very social and I generally love interacting with people when my goal is to make friends but its just another story with girls that I find hot. I am desperate for help.