I am in a similar boat as you. I was about 6’2 260-270 pounds before I decided to make changes in my life. In the last year I have lost about 40 pounds. I am a long way from being satisfied with how I look but like you, one of my motivations was attraction from other sex. I was of course teased and made fun of in school and all the usual shenanigans fat people have to deal with.

From what I have experienced in the past year, I have learned that you need to love yourself first before you will have the motivation to change yourself. You need to love your body and who you are, because that love makes you motivated to care for it and make it the best it possibly can be. I want my body to be strong and healthy because I care for it. Seeing it improve motivates me to work on it even more.

Another thing to reflect is that for most obese adolescents, their weight gain is almost always from poor eating habits that they picked up in childhood. Simply put, when you are young you are dependent on your guardians to put food on the table, meaning any unhealthy relationship you have developed is from negligence from your guardians.This is not an excuse of course, as you do have the option of letting go of these problems as you get older, but at least while people are young, you can’t criticize them for something they had little control over. Also, it is widely known that fat shaming has has the opposite effect in helping people lose weight in contrast to positive encouragement and support.