Hello Sammie!! I felt exactly the same way several months ago...I felt useless, hopeless, and just downright miserable. Nothing fit, nothing looked good, I hated going anywhere for fear of running into people that could potentially recognize me...it was just bad.
There is good news though!! Usually it's at this point where you decide if you are ready to take that big step towards changing your lifestyle. It doesn't have to be a big step, either...it can be as simple as taking a walk 3 times a week, or changing one thing that you eat. For me, it was receiving the weight watchers calculator from my grandma. At first, I would just calculate the points for something, just to see what it was. After a week or so, I did the research to find how many points I should be eating (and was horrified at the amount I had been eating), and changed a few things to stay closer to my points. Then I stopped drinking soda.
Once you make that first step, stick with that step until you are comfortable with it, where it becomes habit or routine. After that, change something else, and do the same thing. Trying to do too much, too fast, can lead to yo-yo dieting and poor results. Making small, lasting choices will help in the long run, and make you feel a lot better about yourself.
You can do this!!! We will all support you, and be here for you!!!