Is he cheating on me???

I was just sitting woth my brother and suddenly my boyfriends facebook poped up. I was so shocked as he deactivated mine and his account at the same time cz we decided to keep our lifes apart from the social media fucked up life. Soo yea right now we are in a long distance relationship he is in Saudi Arabia and i am currently in Canada. 
It's just been I think 15 minutes and I am feeling so empty I can't share my feelings with my family so I just grabed my phone and start to write :(
Why do people do this shit I mean if he likes someone or wanted to use his Facebook he can simply tell me I won't mind it but doing a secret stuff is not acceptable with me I am hating myself right now and feeling empty inside.
Really wanted to go back to saudia and beat the fuck out of him I am sick sick sickkkkkk of this we planned to get married and have kids together have a great life ahead and now phewww....
Well whoever is reading this just tell me what to do I need words of sympathy.