*** Spoiler Alert ***
In chapter 39 I believe we have a major personal growth moment for Ennis:
“Just fine, Ellery. An I am just thrilled yer givin me the bartender job!” Lauren threw his arms around Ellery, who staggered back from his enthusiasm. Unlike Ennis’s usual scowl when someone showed Ellery affection, he grinned broadly.
Ennis knows, respects, and trusts Lauren. Having Simon present and obviously comfortable, and developing deeper trust for the strong relationship he has with Ellery,
Ennis is able to accept friendship with another gay couple. This looks to me like a big step toward our Ennis's feeling more comfortable in his own skin.