Should I give up on my friends with benefits? He's joining the military?

He is leaving for basic training in the army in like three days and since I said bye a few days ago, he has been texting me less and less, even though he said he would stay in contact and make plans to see me when he can. We got really close and were basically dating without the label because he would be leaving in a couple of months. Now I feel like I'm bothering him and he doesn't want to talk anymore, since he used to talk to me all day and now he only answers once a day. I want to call him before he goes but now I am not sure what to do.
Should I give up on my friends with benefits? He's joining the military?
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