Geralt does feel the emotion - love. Can't say they don't have feelings

Depends on whether or not were talking about the book witchers or game witchers

Well i think that Geralt has emotions both in the games and the books. He cares for Milva, Dandelion, Zoltan, Yennefer, Ciri and so on in the books and the same goes for the games too. You can see that Geralt cares for Ciri deeply too. So i think he feels emotion in both of them, and not only him but the other witchers too, like Vesimir cares for his students like Lambert, Eskel and Geralt. He even cares about Geralt's friends and sorceresses like Yennefer, Triss and others.

I don't know about the books because I haven't got the time to finish it this month. But from the game and my perspective.

I think witcher do have emotion but they are good at hiding that (i read this in a forum very long time ago (just speculation) witcher do have an emotion it just after their ritual it makes that emotion (foggy) and less sympathetic and empathetic).

It's not dampening their emotion it just makes them less sympathetic and empathetic. The example is. A soldier that have been trained since child to become ruthless warrior. Then one day this soldier watched his fellow soldier killed innocent people and he felt sad but doesn't really know what's going on (some kind of blurry feeling) (lol its not exactly example that i hope for but probably you know the meaning).

And another example spoiler.

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a. When the great King Foltest died Geralt felt some kind of sad but that sadness is some kind of suppressed and blurry.

b. When Ciri died. Geralt felt sadness but the second after Ciri sacrifice herself Geralt don't go full berserk punching some wall. His emotion is being suppressed (it makes his emotion blurry and some kind of uncontrollable). And because of this suppressed emotion, Geralt suddenly felt something deep inside him that makes him full go berserk to kill that crone and possibly died in that process.

Another example everybody has said it like Geralt happiness with his friends.

Lol (this probably sound confusing). What I'm trying to say is.

Geralt/witcher have emotion. But because of the ritual that emotion is being suppressed and blurry. They feel sad, happy, angry. But those emotion is being jailed by some kind of labyrinth in their heart and mind. And when that emotion is become too severe to overcome they blew up and they will do anything to make that feeling gone just like Geralt bad ending.

I agree with you. An experienced soldier who trained from childhood and had tragic events like leaving his family at a young age and going through the witcher trials would not be as sensitive to emotions as an ordinary man. He learns to hide them and its harder to experience emotions.

He just hides them. Cause that's what he was trained to do. I don't think the trials have any thing to do with it. He needs to hide them so he can kill with out mercy. And get that money.

I think the trials and mutations just weakened his emotions. You saw what damage they do to the body, so it would make sense that they just weaken the emotions. But he is now old and he has both weakened emotions and he trained to hide them so you are probably right too. And he fought monsters countless times so he does not fear them anymore so you are right about that part.

His book counterpart while typically the voice of reason and overall logical can still get super pissed off and allow his emotions to get the better of him on occasion. Triss alludes to the idea that witchers are just deluding themselves into believing they have no emotions