Feeling down and I don't know what to do.

I'm in a relationship with my fiance since 2010. We're so in love that we're also besties. He was a cop in our country but he always wanted to be a soldier in the foreign legion on France to have a better life for us (we have been planning to have a baby soon). He always told me that his life dream was being there. Short story. My father in law retired from his job as a cop to and gave him enough money to do whatever he wanted to. He bought the tickets and three weeks ago, he went to Paris. I'm heartbroken and feel so worried about him. There's almost two weeks that I don't know anything about him, if he's okay, if he's going back to our country, I mean, soon or if he's going to stay there. He told me that he will come for me as soon as possible but I'm so afraid of that and everything. All I can do is cry, thinking about him all and every time of the day. I promised him I'll wait for him. Sometimes I think he's good there and I feel better but other times I feel like he's not okay. I don't know what to do and what to expect from this. I love him more than anything else in the world and this is making me sick. Everyone wants him back, his parents, my family... Any advice? I think I'm not gonna make it. I'm so depressed and anxious.