Tough Day's

Today, is one of the toughest day of my life. I have accepted an offer from other company and need to give big envelope to my current boss. This is my second time in my carrier to give big envelope to my boss. Really feel very very bad. Y feel bad? Because my current boss treat me very good and have promoted me frm a normal engineer to a team lead. But this new company have offer me a vey good package and something that i dream of doing.... more to management.... But what to do, any how also need to break the bad news to my boss. I will go over to see him in the afternoon. Wish me luck.......