Long distance relationship diff countries!

He lives all the way in England and I'm in California! I haven't seen him for 8 months and now he barely texts me. And if I text him he will reply but now he doesn't reply. He keeps saying he will come back but when he does he makes many excuses as to why he can't come. 7 month already, should I move on? He gets so mad when I want to break it off.