At the call.
Service in the army is a serious period in the life of a guy, and your support for him is very important. That's just how to do it, if the conscripts even mobile are selected? Do not despair: in some military units there is access to the Internet, and if the place of service near your city, you can visit him. Long queries to the commanders do not have to write - find out when the guy is free, and come to the checkpoint - he will be called. If you are unlucky, and before the military part for a month on deer, you have not even heard of the Internet, use the tried and tested method - write letters to each other, then love will only be strengthened from a distance. Draw funny pictures for him, put in a photo envelope, send short notes or whole compositions about love. Hard discipline changes the attitude of people to life, and not always for the better. To prevent this from happening, try to remind yourself as often as possible so that he does not feel lonely and lives with love for you.
For knowledge.
He leaves to study in another city or even a country. Not only that education was more important to him than you, there was a real threat that he would meet someone there with the same excellent knowledge of French, and love will pass away from a distance. Do not include jealousy at a distance and do not go insane without a reason. You do not want him to miss such a chance because of your indignation? Most likely, the guy just does not feel like parting, just that he knows that apart from his personal life there is still a career and the better the education, the more chances to succeed, and with love in the distance you somehow manage - he is just sure of it. If you leave, it's still more complicated. It's much harder for a guy to understand that you're worried about your own future, and not going to have fun all day.
To rest.
He is sure that his friends / relatives / parents make him go almost by force, but the fact that they are going to sunbathe on the beach makes the word "forced" rather questionable. Rest - not always synonymous with the resort novel, so in love at a distance you need to continue to believe. The fact that he does not call every fifteen minutes and does not complain that he is dying of boredom is also in the order of things - he is resting, and not languishing in custody! Such separation will affect the relationship, only if you will spoil his mood with reproaches and resentments, and then love can pass.