I was not only an introvert but I sincerely hated being around people I remember once going to a Chanukah party where I knew a lot of people and chose to sit at a table by myself someone I knew from the next table over says come over here why sit alone I know his gesture was a sincere one but I refused.
Back then I didn’t like myself so why should I imagine someone else will so it became a self fulfilling prophecy I wouldn’t give them the chance to reject me so I did it first, after going through therapy I became more comfortable in my own skin and started giving people a chance to see the real me now I am totally opposite I am never afraid of a social situation and I am often the life of the party.
Now I am not suggesting you need therapy or suffer from low self esteem but you have to like who you are and then you will allow others to like you.