If your boyfriend works a lot...

Catharine • There are two ways to behave: as if nothing is a miracle...or as if everything is. -Einstein
He works outside the country so his commute is an hour plus however long it takes to cross the border. He's gone Mon-Fri from 6am to 8pm, and too tired to come over after, and can't spend the night. We don't live together and aren't at that stage. I only see him on weekends. 
I have a really high sex drive, and I don't want to cheat. Can anyone give me a advice on how to get through this and be a good girlfriend?
I do have a job myself but there's a lot more flexibility, more travel.