Boyfriend calls/writes rarely
I'm in a long distance relationship, I'm 21 and he's 25. We've been together for 4 years and talk a lot about getting married and living together after I graduate.
The problem is that he contacts me less often then I'd wish to. Very often he doesn't respond to my emails for a couple days, even up to a week! He says he works hard and is too busy and too tired to write. He indeed works a lot so I understand he doesn't call me 5 times a day etc, but he works at the office, sitting all day in front of a computer and I kind of think if he really loved me he'd always find time to contact me and that would be a pleasure for him after a hard day.
When we meet everything is different, we have great time together and he's the most loving and caring person in the world so I don't understand his behaviour when he's away. What should I think about it?