I've always been an introvert, shy, and conservative person; I lack the confidence to stand my ground and speak for myself. I've never had that many friends, and the few I did have abandoned me when I needed them the most. For example, when I had the idea of starting my own business earlier this year, I talked with two of my best friends and finally convinced them to be my partners, but when it came time to launch my business, they just stopped picking up my calls and ghosted my texts. 

Also, after gathering the courage to propose to a girl in high school, she "pretended" to like me for two years and now she doesn't even pick up the phone or respond to my texts. I don't know what to do with my life; I never enjoyed college because I was too preoccupied with my studies, and now I'm preoccupied with a job that I despise.

 I can't go on like this, so please advise me on what to do.