It is hard to really say whether or not they were in love. I think the word I would use is content. We saw Rumpelstiltskin happy with her, but (for some reason) it didn’t feel passionate. It could be becuse most people only see Rumpelstiltskin with Belle, but I never really got love from Milah or Rumpelstiltskin when they were together–they seemed caring and content and happy with what they had. I wouldn’t call it love.
That said, Milah’s reaction to Rumpelstiltskin coming back was a bit much. It would have been nice to have seen how she was told the news or how she was treated by the other villagers. Instead, we get one scene with her asking Rumpelstiltskin not to wgo to war, but then supporting his choice, and the next scene, she is angry and spiteful and cruel to him.
I think a bit of what she cannot live with is the fact that he ran and the whole village knows it and won’t let him forget it. That was why she wanted to leave–she wanted to be away from it all. And I don’t fault her that. But leaving her son was horrible of her–especially without at least a goodbye. Or letting Rumpelstiltskin think she was kidnapped when she could have just told him or at least left a note.