WHAT DO I DO!?!?! I'M AT A LOSS!?

I really don't want to be ridiculed or called a few choice words when I ask this, but my problem is: I used to live in another state while in high school I was with "Jake" for 2 1/2 years. I move out of state to go to college. It has been almost 2 years since I left. The plan was to finish college and move back. I really love it here (in Arizona) and have made up many reasons not to go back even though I've already graduated. We are still very close and I love him so much. Finally, I bought my ticket to go back. That was 5 months ago. In that time though, I've met a guy ("James"). He really is a great guy and we've been "dating" or "FWB's" for 3 months. My initial plan was not to get attached. I've done a dang good job of it as well. I have 30 days before I go back, and for some reason, the thought of just up and practically "dropping" him is unbearable. I feel heartless to do so. I know he likes me and I like him as well, but I have a life with "Jake" A home, jobs, friends, and so much more. There is no future with "James" as he knows what he wants from life- absolutely nothing but to coaster through it. He has no ambition in life but still, he's such a great guy I would feel horrible to leave him like this. "James" doesn't know about "Jake" Should I say anything, or wait until I get out there and see if he grows distant because I'm no longer in Arizona? Or should I even leave? THANKS and sorry for practically a whole novel. lol