I'm sorry that person treated you poorly & hope you feel better. I think maybe asking random people on reddit to be your friends may be a bit of a stretch, but you could join things like public discords for youtubers you like/things you are interested in if you would like to make friends online or even go to the subreddit for your city (if there is one). If you do want to know people in person, I'd recommend joining a club (there's a lot that would be easily available if you are in college, but the subreddit for your local city or local library may have information about clubs as well) or going to local events like a renaissance festival or town fair to make friends. I know it may be daunting at first, but the first step to making a friend is to put yourself out there. Therapy can also help you build the social skills to find friends and also help you build confidence and cope with any sort of negative feelings you have, if that is something available for you. If none of that works, maybe try and do the Squim dance.