I think she should say no, at least for the time being. Maybe tell Hallie she can't decide right now. I think Lana has too much emotional instability and is too upset to make a decision that is going to affect the rest of her life. She needs to recover much more from the events of this season before she should say yes.
I think she should really say no, because even though they are too developed and mature characters, they need to grow up and live their life until time for marriage arrives. Also, Hallie and Lana have their own issues and as Kyler says, Lana has had a tough season and doesn't need to take a decision that affect her whole life.
I am also saying she should say no. I don't think it's time for them to get engaged/married yet. I think that Lana needs a little more time to mature and that Hallie needs to spend some time living rather than settling down right now. Plus I think Lana and Hallie would struggle trying to deal with their problems and thje twins, so Miranda would get the kids all the time as Hana go from one problem to the next.
I have to agree that she should say no. I think they need time to grow into their lives and see how they could live outside of high school. Although they are totally in love, they have very different lives and unique dreams, so they need more time to figure out their futures. But maybe someday!
Possibly... I think James and Jaxon have more things in common to deal with (and no Eva and Ethan, who make a huge part of a marriage to figure out) And they've been together for longer and so have figured out how to work through things in that way. I think it's still possible that they are too young to work it out, though.
I think the same thing about Jameson. I love they decided to accept themselves in holy matrimony, but I'm still not sure that's the best option for them.
I think Lana should say yes just because they'd be the hottest, awesomest lesbian mothers in the world and Jameson should stay together because they're also perfect together so yeahyeah