Obese person wanting to change?

Well I am obese and I also have a problem with emotional eating. I now want to change my life, and change It for good. I have had a weight loss problem for such a long time! I live with my boyfriend, and he buys junk food quite often, but he's fit, and It's hard seeing junk food when you are trying to lose weight. It's now summer and I want to lose this weight, so tired of looking like this and feeling depressed. what can I do to lose this weight? I am not just 'obese', I am morbidly obese. I know I did this to myself and I am In no way trying to make anyone feel bad for me, I am just trying to look for some helpful advice. thank you....