Need to lose 20 pound by summer time

Hello Everyone my name is Oumou. I use to be 216 for a very long time. Throughout middle and high school and freshman and sophomore of college. When I turned 19 I was going to physical therapy because I had back problems. I guess my posture was really bad and my weight wasn't helping the situation either. So because of my bad habits, he told me that if I didn't change my life, I'd have a hunch back as a old lady. No no no not over here I won't. One thing about me is that I want to live a long healthy life. And I want to be those old ladies that are still kicking when their older. I don't wanna be on a wheel chair because I was to stupid for not changing my life when I could. So that just click in to my head and now I just turned 21 on February 26th and I'm about 165 pounds and my official goal is 145. So follow me to motivate me and I'm sure I can motivate you too.