How to stop going crazy while in a long distance relationship?

I feel like I'm going crazy not seeing my boyfriend. I feel so depressed and lonely. And he seems to be doing well. Like it doesn't affect him as much as it affects me.

Of course he buries himself in work so I can't say for sure if it bothers him but it just seems like it doesn't bother him like it bothers me which just pisses me off.
How to stop going crazy while in a long distance relationship?
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