Left me for 25 days.

Hey ladies, so I am looking for advice. My boyfriend or 3 years tells me that he is going on tour with the Kotton Mouth Kings for 25 days. My boyfriend and his best friend are rappers and are really good and have an awesome style of music. He told me that it is his dream to travel the world. 2 days ago he told me that he is leaving for 25 days and it's going down. I feel a little abandoned but I am not a selfish person and I want him to accomplish his goals. Am I selfish for feeling abandoned? Am I wrong to miss him? We have never been through this before being together. Maybe I am just over dramatic... Lol thx your advice!