This sounds really dumb but I cant stop thinking about it. I recently found a job and the store hired me because my coworker had to leave to focus on other things. Before she left she had two days to teach me how everything worked and made the whole thing fun and not as intimidating. But on our last day of working together my stupid brain decided I was too afraid to go up to her and thank her and properly say goodbye before leaving. Instead, after my boss said I should clock out for the day I completed my chore, grabbed my stuff, and headed to the exit. She was across the room as I was leaving and I just awkwardly waved goodbye and she waved back but I regretted it as soon as I left. She probably thinks how mean I was and the whole thing just makes me cringe to no end

Its eating me up so much because I feel like I ruin every potential positive thing I have in my life. For context I lost my online friend group last year, dont have any irl friends, and go to college for something I dont enjoy. My only consolation is that we will all die some day and all this pain will go away. But I cant believe this is my reality. I cant believe I keep making mistakes like this. I just wish I properly said goodbye so it could have been one positive memory to keep me going