Let me put it this way, you are bigger then some young men who post that have no problem at all, but for some reason think they do. However, you would have a long way to go to get to someone like some of us old farts like myself that have DDs, but have learn to live with them for one of many reasons.
You will need to have surgery to get rid of them! I'm sorry if that is not the news you wanted to hear, but that is the truth! If that is what you are going to do then you must take the time and do the research and find a experience gynecomastia surgeon to make sure that you have a better chance of being happy with the outcome with the surgery.
Good luck!
Bob