I don't know why but I can't get exp with the Prince. I even have the guide and I know that says that after I complete a mission or a task I should go talk to Cliff, but doing so only increase my relationship points with the Marada Queen, I'm so bummed. What am I doing wrong?

Uhm, what version are you playing? I never had reports of Cliff romance not working before, strange!

I have the version 1.2

Well, it's working but somehow I can't get his ''best'' ending in the end he kind of dumps Joshua. Is that how it is or is it just because I can't seem to achieve his full ''romance bar'' (?)

Version 1.2 is VERY OLD. I don't even know how you got it, since is not available on my servers anymore. I recommend you download a new one and start a new game, otherwise I don't think will work correctly.

The ending is still the same anyway, if you unlocked the romance CG then you saw it. The romances in that game don't carry on until the end (that's how it was written).

I purchased it a few years ago but never tried Cliff's path before, that must be why. haha

But thanks anyway and sorry to bother you.