LDR's

I am in love with my boyfriend of a year. He is a dentist, and a Sagittarius. Very open and talkative. Travels often. I don't get hardly enough attention from him AT ALL. We used to see each other every weekend (we live an hour away) now it's sparse, and he is in CO for an externship. I'm just very unhappy, and craving the touch of a man since it's been 3 weeks. I need help I think. Advice?