Hard stuff huh?
First of all, Welcome to PC! Here there are nice people and we all try to help each other (i said try, sometimes it's harder situations hehe).

Now to the point. It leaves me thinking the fat that you almost slept with this friend. But as i understood you, you didn't, did you? If my statement is correct, then there's not much to worry about.
Now, do you believe Jake still wants to be with you? Don't take this bad, i mean, distance can actually change people.
If you really love him and also feel that he loves you, then go on and do the best you can, because love is a precious gift.

Best of wishes and good luck!
Oh, and also, about telling him... Well, i might not be your best advice. Maybe wait 'till you see things clearer.