i+an+not+by+any+means+a+perfect+parent+but+it+sounds+like+to+me+there+is+a+power+struggle+going+on+here+and+he+needs+to+realize+that+you+are+the+one+in+control+not+him+
Well, Brenda, if you had this child at 15, you probably didn't have a lot of parenting skills. You probably also had a lot going on that distracted you. This could have effected how he feels about you - or it could just be the old ADHD thing doing its thing. Take the time to look at a lot of the posts on this site, and you will see numerous ones from parents crying for help. You will also find lots of good answers for their problems. So really take the time to go through some of the other posts.
When you have done so, and you have questions please get back to us. Or if you can give more information about your son (here again, take a look at what other people have said about their kids for an idea of what kind of info to give), so that we have some specifics to go on - I am sure we can give you some ideas of things to do.