I blow.....

With school and life in general I have pretty much given up... I feel fat a gross and need some help getting active.. Everytime I get anytime to myself I just want to sit on my ass and do nothing. I feel like a lazy blob and with summer around the corner, oh god.... I need some suggestions... something that will get me going and something that i will be able to keep up with school three kids and well life.... I hate that my summer close do not fit and will ot fit....