The important thing here is that you don’t come across as if you are “entitled” to be the project lead. When you used the word “insist,” it implies that you are deserving of such an opportunity. You may be, but that would not be the way you’d want to approach you boss. Instead, go in with two agendas.

The first agenda would be to let your boss know that you are ready and willing to take the lead on the project and would love the opportunity to prove to him that you can do it. Be upbeat and positive.

The second agenda is to make sure he knows that if you are not selected this time, that you’d like to be considered in the future. Ask him what one or two things you could improve upon so that he feels more comfortable selecting you as project lead in the future. Whatever he tells you, make sure you work on those areas. Because your performance review is due as well, your boss will be impressed with your motivation and leadership to step up, even if you are not the person he has in mind to lead the project. Where you will additionally score points is by accepting his decision and seeking out feedback on areas for improvement. This step alone will set you up for great success in the future.