I feel fat

So recently I've started to notice more and more how much bigger I am than I was a year ago and I feel disgusting. I want to lose the weight but the only exercise I enjoy doing is dance or zumba or something along those lines and because I don't have a job at the moment I can't afford classes. I'm only 18, almost 19, but I feel like my parents won't help me pay for it, even though they always say I should do more exercise. I'm stuck in a loop of hating myself and then having a patch where I just accept what I look like and back to hating myself again. Has anyone felt like this before? What did you do to help lose the weight?