Hey guys, I've been debating romancing Solas in my second playthrough. I'm basically torn between him and Josephine in this particular PC's case. So far I've flirted with both of them, but do you guys know where the specific point where I'd have to make a decision before one locks the other out is? I've heard it's when you arrive at Skyhold.
Ok so I looked it up and apparently you're locked out of a Solasmance right when you begin a romance with anyone else. There will be two options for the other romances, and if you hover on both, one will have a sidenote above it saying something like "begin romance with *****" and the other will say something referring to not beginning a romance. Picking the option to start a romance locks you out of Solas' romance. As for being locked in, you can't dump him after the balcony kissy scene. You guys are forever locked into the romance, no matter what *stuff* (trying not to spoil anything) happens later. The romance technically never ends.
For Josephine I couldn't really find anything, but apparently an important thing you have to do is flirt with Josephine, then talk to Leliana, state your intentions towards Josephine to her (kinda like asking the dad for permission) and then the rest of the flirt dialogue options are unlocked to proceed with the romance.
Now, honestly, because I love Solas' character and story deeply, I'm gonna have to suggest going with his romance. It will undoubtedly be very interesting to continue with into the Trespasser DLC and, because of the amount of emotion and depth fit into the romance, you WILL care about what happens with Solas, who will most likely be a big player in future games.
JOIN US IN OUR AGONY
Hope I helped 
(no but srsly Solas is bae)