ahh it's driving me crazy

I have known my bf for four years. We were in hs and now in college. We were the age were we were making plans, deciding careers, etc. he always always has wanted to be a police, homeland security, FBI agent anything along those lines. Two years ago he and this whole plan that he wanted to be in D.C. and work on federal buildings. I 100% supported him but then he realized he wanted to go to college close to home. Now 2 years later he has this amazing opportunity to intern in D.C. for 6 weeks this summer. It's all college people so he will meet and live with people his age. He hasn't filled out the application!!!! I don't understand why at all! This has always been his plan and it's only for 6 weeks. His college is 2 hours from his house so it's not like he's not used to being away. I'm sure the 6 weeks will fly by and he will have an amazing time. I would visit because I part jealous that he has this opportunity which is free! Idk if he's nervous because he is a little shy but has dramatically become more outgoing since dating me and starting college. He has joined tons of stuff at college to make friends. I asked him does he not want to do his major anymore and he said he obviously still does. I just don't get it! I feel like he will regret not doing this. We are long distance so it's not like he will miss out on summer with me and he works at his family business so it's not like he will lose his job. What do you guys think??