Firstly, i'm the same. I do stupid things and then beat myself up over them all the time. I imagine there are a lot of us out there. Secondly, lets be positive. You have a friend , hopefully one of several. If they are a real friend they won't be thinking how stupid you've been and even if they do they probably put it down to one of your idiosyncrasies. Why would they hate you?
Try and do things that make you feel good about yourself. For me it was exercise. but just getting things done makes you feel better. maybe look at the accountability thread on here and post some things that you want to achieve and do them.
Get into good habits and healthy thinking. I'm trying. Sometimes very trying, haha. Good luck.