Hotels Last Minute Deals

My boyfriend travels for work about once a month. Sometimes it is for a week, sometimes for a few days, sometimes even just one day. Most of the time he has to travel to go to business conferences but there are cases where will travel 10 hours on a plane to have dinner with a “client”. Of course, I hate when he has to leave, but its part of his job so I deal with it. It is HOW he treats me while he is away/traveling. I rarely get more than one phone call a day (which I call him, and the conversation would never last more than 5 minutes). He acts like he is so busy (which I know he is at the conferences/meetings)but when I know for a fact (he has told me this), most of the time he just sits in his hotel room and goes online, yet he doesnt have the time to call, text or even IM me! How do I deal with this? He never says he misses me or asks how my day was like he would if he were home. It just really makes me mad he ignores me and treats me like crap while hes away. Why does he do this?