Where's this going to go?

So I've known her for 10 months now. I love her, I'm pretty sure of that. It feels so ominous though. And I don't kn ow if my feeling are legit or just my own fears. I know once we break up that she will have a boyfriend within a week at the most. Whereas I will still be alone, just like usual. It doesn't even feel real sometimes, that's probably because of the distance though. I'm probably going to ride this out as long as I can, but I really don't know if this going to last.