Lots of good stuff here. Unfortunately I don't think we will ever get an exact picture of what happened between the games. He regained his memory and started search for Yennefer. Everything else you must fill in by yourself. I'll try to offer what I can but I am by no means an expert.
Geralt is what at her? no idea what you meant there sorry.
Pissed at her. Although, this again, is up for interpretation. It depends on what he is pissed about exactly. Really the only thing he
could reasonably be pissed about is her taking advantage of his amnesia. I think she pretty much made up for it by going to quite extensive lengths in helping him get his memory back. It's not like there wasn't already something between them anyways. I see it more as capitalizing on the opportunity in front of her. Didn't they also say that for a little while, they thought Yennefer was dead? Beside the point really. Sure she took advantage but it's not like he didn't get anything out of it. He got a job, a lady, and he did eventually get his memory back. Keep in mind, if she truly was taking advantage of him, I don't think she would have helped him to get his memory back. She would have just walked into the sunset with him and never looked back. Doesn't quite fit the whole "taking advantage of" mindset.
She did, however, cop to having taken advantage of him. Again, I've not read the books so I could be wrong about a lot of this.
just replayed the warehouse part. Lots of double meaning in their conversation. This time I was able to get more out of it. Still don't grasp the whole picture though, what does exactly Triss means when she says, "reconciled?"
Geralt kind of sees through that and tells her she must accept the truth, truth being what exactly?
Reconciled --> restore friendly relations
between
The dialogue branches here and I think the one that gives you the most possible clues is when Geralt tells the story about the man who lost his legs.
G "We all lie sometimes. But lying to yourself is running away, whereas there's really nowhere to run."
T "Sometimes you have to escape just to forget. Your friend might have dwelled on his lost legs. But it's not like by grieving he could've grown another pair."
Geralt first says that it's good to see you safe and sound and... "Reconciled?" Then he can tell his story. No real transition. Like he's calling her out, telling her that she's lying. She's not reconciled. She's not okay about them splitting up. She keeps telling herself that she is though, because grieving about Geralt being gone isn't going to bring him back. That is why she has been formulating this plan to lead the mages to Kovir. She isn't going to sit around and wait for him - which I have to say, I give her a lot of credit for. She's actively trying to move on.
Anyway, my understanding of the scene in general is that she dumped Geralt when he got his memories and set out to find Yen. She acted tough when she did that, stating that she didn't care or similar. And even when they meet again she is still trying to pretend as if she's moved on and the whole thing doesn't bother her anymore. Geralt sees through her and presses her to reveal her feeling or to at least be honest with herself.
You say she dumped him and Willow says he dumped her. I think, based on how we left it in W2 and how it picks up in W3, neither of these is completely true. They seemed like they could have gone off and just been happy together at the end of the W2. He got his memory back though and suddenly remembered about Yennefer. I think Geralt wanted to go and Triss decided to not try to stop him. It was a mutual split. They left it open however though, because they knew what they had was real, there was something between them. If Geralt left and fell for Yennefer all over again, then so be it, Triss was ready to move on. If he found Yennefer and realized the "magic's gone" so to say, then she would be happy about that. I think she knew how strong the bond between them though so she thought the latter was a long shot. That's why at the lighthouse she said she wouldn't have imagined staying.
Upon meeting in Novigrad, she is immediately pleased to see him but is also confused/nervous about what to feel. Is he back with Yen? Is he there for her? This is where you can make your choice. Are you there for her or are you holding out for Yennefer? I actually really enjoy that she didn't immediately swoon in front of him. She tries to keep up a tough exterior,
@ltdk92 says, as a defense mechanism. She's actually shown a lot of growth over the games. Kudos to that CDPR.
The only part that confuses me is when she asks "So, tell me how Yen's doing?"
You can either say
"She's fine."
"Not bad."
"I don't know."
Triss always responds with a very somber, depressed sounding "Never mind. I got my answer." I don't know what exactly she was expecting to hear. The only thing I can reasonably conclude is maybe she was hoping he had given up on finding Yennefer? Which isn't really in keeping with some of her earlier comments. Like I said, that line is where she kind of loses me.
So in summary, this is the way I play it in my head anyways, they had a mutual split when Geralt fully regained his memories. When they met up in Novigrad she tried to convince herself that she didn't feel anything, to keep her from getting hurt. Feelings don't disappear just like that though & it's clear she's still hurting about losing him.
Nobody is perfect in a situation like this and their situation is rather unique as she knew she would be competing with Yennefer, the love of Geralt's life. They've both made some mistakes but the fact that they truly can reconcile in the end show's that they are willing to look past those mistakes. If you are going for Yennefer, however, then you would likely say it's good she kept her defenses up. I don't think even the Yen-camp wants to break Triss's heart again. Just like I loathed the break up in the Last Wish. Breaking Yennefer's heart like that is tough to watch. Knowing all their history doesn't mean anything anymore. The potential dynamic between the three characters is amazing. If you can tell yourself what's going on behind the scenes, it's actually a pretty emotional and fulfilling situation. Still I would rather the issues be made explicit - to see them unfold on the screen right there in front of you.