How can I foster a better, more likable personality?

[Aames]

I had a realization. No one is going to want to be friends with me or accept me if I am a complete douche, no matter how aesthetic I become. I have allowed myself to develop many narcissistic traits. I only give attention to those that love and accept me. If I detect the slightest hint of rejection, I immediately discredit the person and start to hate them. I'm realizing that my personality may be what is causing people to stay away from me. When I ask people their first impressions of me, I often hear the words "douche", "snob", "asshole", "stand offish", and "conceited". My forum demeanor probably reflects this sometimes, for which I am eternally sorry.

But I digress. I will never turn back on my quest for perfection, but I now wish to perfect my personality as well. I want to become likable and friendly, someone that everyone feels comfortable with. How do I go about this? I think I used to be friendly before all of this consumed me. My long-term friends seem to like me and find me very funny at times. Any advice, brahs?