it's a magical world

Honestly, I was in that exact boat all these past nine months. It's crazy insane having to be separated from your significant other for a prolonged amount of time with nothing to rely on but the internet and sporadic phone time, and, yes, there have been times when I was chatting with a guy or a girl and I suddenly imagined what it would be like to be available because, hey, he/she's cute and funny and enjoyable and why SHOULDN'T I have fun while I'm over here? But (for me, at least), it never lasted long and I always felt a twinge of guilt, no matter how good it feels to be flirted with. What I guess I'm trying to say is that thinking such things, even if you do love him, is perfectly normal. It shows you're in touch with reality, I say. Why shouldn't you consider your choices rather than just cling on blindly? I mean, it's your life! Maybe you should think about bringing it up with him? Maybe he'll feel the same, you never know. Or maybe you'll decide in the long run -- like me -- that if it's good, if it's lasting, then it will continue to be good and last even when there's a big, giant pond between you two. :)