Hi Kytiane!
I've been in the same situation. I am in the UK and my boyfriend has been working in America since the first week of June. I will finally see him in 2 and a half weeks time..but like your fella he has had very limited access to his email account, and phone calls were few and far between up until the middle of July!
My best advice is to keep busy busy busy. Throw yourself into something creative, have a good laugh with friends, make plans and arrange days/nights out around dates in the not-so-distant future..If there's somewhere you want to visit/something you want to do, optimise August and make these things possible. A month will flyyy by.
Something I've found very theraputic is to send my boy a letter with some photos and sweets attached
(done recently) because it was great to be able to jot stuff/recent happenings down and then it gives him a token to return home with.
Set little targets and treat yourself often. Moping doesn't help, but forward thinking does. Perhaps you could ask him to get a phonecard or arrange a night of the week where you get to chat to one another properly?
Be social and outgoing in the meantime, and the next month will fly. I haven't seen my bf for 2 months now, but it's time to get excited because it's now a matter of weeks if you know what I mean?
Hope this helps x