I don't subscribe to the old adage of don't move in with someone if what you really want is to marry them. I remember that was a common train of thought a few decades ago, but not so much now.
My son has lived with his now-fiancee for about 3 years and are planning to marry in Nov. She is a few years older than him and had made it known she's not getting any younger and she wants to have children, but with her husband, not outside of marriage. My son was non-committal on the child topic with her, with me, with everyone...so I bluntly told him if he really didn't want children, he needs to cut her loose so she can find someone else. He finally proposed last summer and now wishes he'd done it a lot sooner.
IMHO, Evan is not attractive at all, physically nor personality-wise. I know he can't help it, but the dark circles around his eyes are very distracting. He is very immature and whomever is with him will continue to deal with his issues.
John can do so much better than Kady. She loves to emasculate him every chance she gets. It appears she prefers what I refer to as "dick swingers" - guys who are overtly macho, need to feel superior to all other guys by having the biggest, bestest whatever is being discussed. John is an Everyman to me. He seems like a big teddy bear who is sensitive and considerate. His looks are average, but then I wouldn't want my guy to be drop-dead gorgeous - looks change, but ugly runs deep - and I'm in no way gorgeous, so there's that, too. He has a lot of the same qualities as my hubby, come to think of it.
Jason, the architect, is the best-looking guy there, sounds like he has a good head on his shoulders and is well-spoken. The girls would benefit listening to what he has to say and take heed.