Yes and No
It's a sloooow burn. It's clear they grow to respect one another in ME. Then in ME2 there is an absolutely heartwrenching confrontation scene. I hear it's actually horrible for FemShep, but for BroShep, it kind of just becomes clear how much they care for one another. I half-expected Shepard to reach out and cry, "Noo, come back, my love!" when Kaidan turned and walked away LOL Then along comes ME3. Kaidan's still upset but Shepard can keep reassuring him. Flirting happens... reconciliation... then finally the kindling of a romance loooong in the making 
Can't do FemShep, as much as I would like. Hawke is the same. Just.... doesn't work for me. Hawke is and will be a snarky male, some Isabela before ultimately deciding for Fenris *although Merrill once totally ninja'd him. She's sneaky that way
*
Wish there was something similar in DA:I too. Like DAO with Alistair. Whenever I decided, this time I'm going with Zev or Leli, nooope. Al and his rose. Always^^
Imagine Cullen just sweeping you off your feet without you going to him and initiating the romance
*wishfull thinking*
On the other side, the scene with Jim interrupting them totally makes up for the lack of ninja Cullen 
Just happy I can go in to that game nearly without spoilers lol. Totally spoiled every single DA game so far >_< First cause I needed to know if I survive the whole shebang, 2nd cause I went with femHawke and Anders and wasn't too keen on both decisions^^ and third cause I NEEDED!!!! to know how the Cullen romance was going and watched every single vid before playing and thus spoilered nearly everything for me *sigh*