Am i wasting my time?

Me and my bf have been together for 1 1/2 years and we are both 23. I am currently in grad school while he just moved out west for 6 months to work on a ski hill and snowboard. A few months prior to him leaving we decided we wanted to stay together and I must admit a have had a lot of insecurities with this and put him through a mini-hell but left things being great. So he drove 4 days with his best friend out west and didn't really contact me much and when he did the convo's were short and he never expressed any "i love you's" and seem very disengaged. I'm starting to have a growing fear that he is either going to cheat on me or leave me forthe partying that will occur out west. My bf is not very emotional and has trouble expressing how he feels. He doesn't like talking about the future and never lets anyone hold him down. Everyone says im being stupid for sticking around and that he can't be a long distance bf. I have been very hurt in the past and i'm actually having nightmares about him leaving me. I don't know what to do because a part of me knows im being a little nuts but another part of me says that i shouldn't have to settle and feel this insecure in my relationship. I love this man and truly could marry him down the road and i know he loves me too. I just worry about his bf skills and I don't think he realizes the effort a long distance relationship takes (3 hour time difference). This anxiety is seriously taking over my life and I don't know what to do. I've tried talking to him but he always reures me he loves me and wants this to work. I don't know what to do? Do I stay or do I go?