Yessss. Now that it's nice outside again, he'll probably be getting groups together to play soccer/football/whatever down at the park on weekends. So She'll be on is invite list.
And fantastic. Jillian wouldn't have done anything about it back then, aside from be awkward around her. She'll try to be less awkward now that they are adults.
Mari totally gets not being social. She did that for years and is trying to be better about that too. So maybe they can chit-chat on the network at some point.