I feel very proud to be able to make that importante change at work and I think that my boss will do something for me. Maybe it will be a raise in my salary. 
It always feels exciting to do something big at work. It always feels good to feel like you are making progress in your career. 
Yes, and my collegues and friend are very happy too. They see me as a new leader in the group.
Also, maybe this is something you can put on your resume and it will look good in the future. 
Sure I will do that. But I really enjoy working at that place and I wish to stay there many years. 