Should I break up?

Hey guys I'm in this relationship with a guy who is nice and everything but one way or another I don't feel satisfied - or just that I feel bored speaking to him. Even now our schedules don't mix real well to arrange meeting - just like once in a while.A few months from now I am flying abroad too - which can really doom the relationship, but I haven't told him yet. I'm kinda confused right now and I'm his second guy, I don't wanna hurt him though.Any advice would help. We are closeted anyway, it's kinda bad weather for gays here.