I feel totally broken

I am just so very sad and I can't shake it.  I hate admitting when I am sad but this is killing me.  My boyfriend and I are having some issues so I know that has a lot to do with it.  I just want us to be happy.  I love him so much and I need him in my life.  

I am unhappy with my weight and I really need to get off my butt and do something about it.  But when I am sad I just eat and eat and eat, which makes me feel sad....so I eat more.  It is a TERRIBLE cycle.  I just want to cry.