I don't know what to do?

I have a boyfriend in the us ( i am in denmark) and we have been together on and off for almost 3 years. I love this guy to death, and i find it harder and harder to leave every time i go visit him. now our relationship isn't perfect at all, we both have trust issues and i know to make something work from this distance u have to trust each other.. we have tried to let each other go several times but we can't seem to stay away from each other, we always end up getting back together.I don't know what to do, i want to be with him more than anything but it's almost impossible as we are both not ready for marriage. I was planning on going to college in london even tho i have a vocational diploma but at this moment i am thinking about just getting a job and go see him as much as possible until maybe he is ready for marriage.. i don't know.. i love him so much and miss him and since i got back from my last trip there i cry every night cuz i want to see him.. what do u think i should do?