Boyfriend dumped me after having ?

I am totaly confused. I have been dating a nice single man for 3 months. And we would text each other every day for 3 months when we are not together. He said that he was falling in love with me and wants me to be with him in his future. Just recently, we had for the first time in 3 months. It was great, I thought. I expected him to contact me the next day as usual but he never did. I texed him after 3 days saying I was going on a vacation and be back by a certain date and he answered by texting me saying he was at work and to busy to talk. Its been 6 days still no word. I guess he dumped me.