is enlightenment realy the ultimate happyness?

Yeah that's the process. You can't just want to be enlightened and then it happens. There's a lot of "false you" that needs to be peeled away so you can see yourself as you really are. It's painful, unbareable at times...but I have found that once you've started down the path you can't turn back. It gets better though, even when it seems like it isn't getting better and it never will...it does, in it's own time but never in yours.
It's painful because the ego doesn't like it btw. It's the ego that creates/feels/is the pain. The pain body etc..
Also, I have found that the truth is actually wordless. Words, explanations, teachings etc...are meant to point the way to the truth. They are not meant to be truth. You can find your own ways of unlocking yourself and revealing the truth to yourself. If something isn't speaking to you try something else. Or meditate on/consider deeply the blockage/problem/issue you are experiencing and whats true will come to you on it's own.
Lastly, believe it or not, happiness isn't the holy grail. There's so much more...and even though you may not understand this now, happiness is actually something the ego wants, because it has no real sense of being. You don't need happiness in order to be you/complete etc...
The truth of being is not being happy as opposed to being sad. There is nothing additional - it's just being.
And it feels magic. It's everything.

Sounds a bit harsh.
Maybe what they're trying to say is that joy should come from the many things we take for granted.
Like....the natural world. The weather. The amazing way in which nature operates in order to bring and sustain life.
Rather than the more common idea of gaining possessions as a sign of happiness or success....?

I've been curious about this as well. I think that desire means expecting something and wanting it to happen, so if you expect something and it doesn't happen, you get disappointed, that's why expectations are the reason behind pain

I see what you mean. I think people give way too much importance to their "egos". I don't think forgetting about "you" is the answer, but neither is focusing on it. I do find happines in enlightnement, maybe because I need to satisfy my curiosity. You know, I don't accept all the preconceived labels, I want to question everything and decide for myself what's right and what's wrong. I think each one has their own truth, even though most people don't even care about looking for it. For example, I love wondering about this kind of things.

Desires are only painful to those who do not have the will to act upon them. Do what makes you happy, but don't feel tied to some specific mindset or set of rules. Most of us live in only one of many different systems. Choose the one that you enjoy and make the most of it.

I'm no expert on Buddhist philosophy but as I understand it Buddhism doesn't say one should put aside your current life, but rather you should accept that this existence is temporary and you should not become overly attached as attachment leads to suffering.

Total happiness is best achieved "artificially." But it isn't very sustainable.

Hmmmmm a life without joy sounds fun