Weight Loss

Presly
So it's not surprise that I might be a little chunky. I have been called or asked if I was Pregnant Numerous times. Today my 4th block teacher asked me if I was pregnant , and after I told her no she apologized and tried to make me feel better and said all this bs about my weight (stuff like , your weight doesn't matter, etc.) Honestly I cried but not long , I wanna make a change with my weight 
Ithis is me from the previous summer, yes I know what everyone's gonna say "oh your not fat, nothing's wrong" I chose this picture because this is the only picture I have in a baithing suit. The only reason I'm posting and typing all this is because I want everyone's input on HOW I could lose weight. What works best dieting?, working out? Etc.