How I want to lose a lot of weight for my son

As much as I remember I’ve been always overweight, and now I think I'm the heaviest I've ever been. All of it started after I quit playing sports in my high school, and I started working at a restaurant. Because of working long hours I started eating wrong, and I rarely worked out. However now I feel like my time of transformation has come, and I really would like to get rid of weight once and for all. You might ask me what motivated me? Well, nothing much. It is just I have a young son, and I would like to set a great example for him. I have tried a lot of diet programs and diet pills that I am tired of them. At this point I would like to Adipex. I've been taking it for a while now, and I actually see some good results. However, I don't eat very healthy, and I do not go to the gym very often. It is just I do not have much time cause of my job. I really worry about my weight reduction cause I want to do it in the right way this time. Do you have thoughts what I need to do to lose body fat in a very healthy way?