not to discount your feelings of despair, but if you continually focus on bad things going on in your life, they will only be magnified. i have felt how you feel, like nothing is going right in my life. but i started to make time to write down things i am thankful for, and all the good that is happening, and i am much happier. i know this is the case in your life, there are good things. whatever you focus on is magnified.
i know it sounds silly, but it really does help. i have also felt alone. like everyone has a life except me. please know that for everyone there is a niche in life. here's to hoping you find yours. <3