I don't think it EVER gets easy.
I think, as a runner, your willingness to be uncomfortable and your pain threshold, they just increase. I know, because I'm practically an expert. I mean. I've been running for 6 months now.
Yes, in fact, I DID have a tough long run today. Why do you ask?
Giveaway next week, btw. I'm still fundraising for Pediatric Cancer Research Foundation. Link is on my sidebar. I'm less than $175 away from my goal of $2000!