Horny in a long distance relationship...😩 SOS WHAT AM I GOING TO DO!!

It's hasn't always been like this we've been together for 4 years lived together for 3 but he left for a job to make money for us to not struggle and I love him so much but what can I do when he's 1000 miles away and I'm just so horny masterbation doesn't help AT ALL! And I'm not going to cheat on him but all I can picture is doing random guys but I would never act apon them but what can I do I can't see him for 3more month😩HELP!!!