Ask yourself if your sister was angry or just plain sleepy. (Some of us as kind of dopey come Monday morning.)
As for being lonely, see what you wrote above. You are accepting victim thinking again, Angel. No one is dictating that you must be lonely, but you're buying into that scenario, see? It's negative self-talk and self-defeating.
No matter how small the town you are in, do take some action. I just moved to a small town too, where I know no one, yet, but I know I will. As I was leaving my other home for this one, a woman came over to give me a little souvenir key chain. I never knew her full name, but we used to meet outdoors when walking the dogs and occasionally stop to chat. She said she had come to enjoy our encounters. Perhaps you can meet someone that way. You just never know.
Perhaps you can call the town hall too, and see what groups exist there. (They usually have a list) Maybe you could join one of them? There are service clubs like the Lions and Kiwanis, etc. You can meet people through volunteer work at some of them and maybe make a friend or two. To get out of this slump, Angel, you have to be ready to slowly take back control of your life. It won't happen overnight, but it can happen one step at a time. Do give yourself permission to win over this. You can get through this. We do care what happens to you.