All we have is the unrequited crush on Future Mom and nothing either way with Present Girl.
I don't think Michi even has a crush on Mirai, she's just treating marriage a her duty. See page ch. 6 p. 106 and ch. 5 p. 37, she doesn't really do "choosing for herself".
It may or may not turn into something else, but right now, just becoming friends with Mirai and Kako and living away from her family sounds like the best route. And of course, taking care of Nozomi when the other two are busy.