I wouldn't make any big decisions. You have a 13 month old and from the way it sounds you are relatively settled in Chicago. If you really care about this guy, then tell him you need to think and to see how things go. You can still see each other, not as often but you'll learn if you really care about one another regardless of proximity. Think about yourself and your baby first. With your guy's absence you should be able to figure out if you can or can't live without him. We cavemen can be a fickle lot, but when we find the one we want to keep we keep 'em. He also must learn whether you are the one he wants. That is what it boils down to. If you two really are in love, you can't live without him and he needs to be near you, then you will work something out. That's the way love is.

Good luck.

__________________
"Even a man who is pure of heart
And says his prayers by night
Can become a wolf when the wolfbane blooms
And the moon is full and bright."