Behavioral issues. Also an issue. help.

Extreme behavior most of the times. When I am happy I am really happy, when I am upset I am really upset. I pick up fights with loved ones for no reason, especially my boyfriend. Even the slightest thing sets me off and sadly he becomes the target. Don't mean to do that, but I have no out for all the anger I feel for the stupidest reasons. Binge eat a lot. To the point that I have managed to gain more than 25kgs in 3 years. Have been told by my doctor that I need to lose the weight but still cannot stop eating junk food. I want to lose the weight but food is the only thing that makes me feel better. And I get super anxious about each and everything. Whenever my boss calls me in, I feel like I am gonna get fired. When I get an unexpected call, I think its a bad news. I always think its something negative. I moved to a new place 3-4 months ago and I have no friends at all, not even at work. I think about getting in touch with old ones but I just don't. Sleep is also an issue. Help.