Any ideas on how to rekindle a 4yr. relationship w/ my boyfriend even tho we're 600 miles apart this summer?

My boyfriend and I have been together for over four years and I think between stress from school and work we have taken each other for granted. Recently it feels like he never wants to hang out with me so I have been trying to figure out what made us fall for each other in the first place so I can recreate it...to an extent. Any ideas on what we can do to bring that excitement and romance back into our lives? Thank you so much for your help!!