I need help

I'm at a point where I feel like I desperately need with emotional issues. Even though I am surrounded by people and have a lot of contact with people, I feel incredibly isolated. I am really struggling with trying to build meaningful interactions and relationships, but I can't...there are some things I recognize as where yes, I am obnoxious, but I can't seem to stop myself from doing. There are other times where I have no idea what I am doing wrong and am so incredibly frustrated because it'll seem like I am building a really nice relationship, I think I'm doing everything right, but nope. It blows up in my face. I'm even more frustrated because I end up holding a ton in...I don't know how or to who I can vent in a positive manner...And then things blow up even more in my face when I snap and just completely go off the deep end or I just get way too needy. And I am completely not dealing with this in a healthy manner. I had been so proud of myself when I managed to lose 70 pounds. But now...with feeling so lonely and isolated, I am having a really hard time controlling my eating. And I have been drinking heavily. To the point of blacking out. And I will wake up in the morning to find a bunch of food missing from my fridge and cabinets, dirty dishes all over the place. It is turning into a vicious downward spiral of me feeling even worse and more isolated.