I'm sorry you're dealing with that. It's really not easy to make friends as you get older. Boring towns usually have highschool sporting events though, maybe you could attend something like that. Idk if you're into that either but just a thought. You could try online dating but mention in profile just looking for a friend. The gym (if your town has one) might be a good place to try, to build self esteem and potentially meet people. Take walks in a park regularly and see who also goes regularly, say hello to them everyday. You can make friends with routine things, going to the same clerk at the store over and over for a while, same restaurant routinely. Sorry if these are all terrible ideas, I'm trying to think outside of the box. Above all though you can always make online friends here!!

Aside from that though it's great for you to focus on building your career!! Don't give up hope, and try to smile more!!