I´m pretty sure Elena gets a massive hangover when she´s herself under control again after her wild “blood games” with Damon and she will regret it. But then she´s too much destroyed and Stefan (Bonnie,Caroline,maybe even Matt) will turn away from her…

Damon “without a care in the world”…is she watching the same show we are?  The man just lost his ONLY friend watching him die twice, his brother betrayed their trust by not saving the woman they mutally loved and said woman passed him over for his brother in addition to treating him like he was the problem.  I’m sorry I don’t consider this as someone who doesn’t have a care in the world.  Also his plans have become less reckless/diabolical over time.  Yep he likes to have fun but I’m going to disagree with some of her descriptions about him.

Elena needs to let loose for sure but what I’m concerned about is that we’re going to see her use Damon again just for this purpose.  She’ll have some fun with him (because apparently that’s all he’s good for not real love) and then she’ll regret it blaming herself and him then return to her praising Stefan and denouncing him.  Um as much fun as it might sound like to see her and Damon have a good time together I don’t want to see him get used again just so we can go back to the same old thing with her and Stefan.  If that’s the plan can we just skip it and let Damon have some fun with someone less emotionally draining on him?  I can’t speak for anyone else but the breaking his heart routine is wearing on me.

Well, and it’s just getting old!!! Right? I mean we’re all expecting that is how she will treat Damon!
I will say though in the books, that’s exactly how she treats Damon, she uses him when she wants and tells him it will always be Stefan! So I guess when it comes to that concept they have chosen to follow the books from what we saw in S3! 
I really hope they have something else up their sleeve! 
And once again whenever something bad happens it’s Damon’s fault! He is always the fall guy for any s%*t that goes down!
And I so agree with you, I don’t see Damon as care-free at all, he may be acting like it- but he cares a lot and deeply! 
He tries to shut it off, and not care but pays the consequence in the end!

I’ve read a little over half of the books and you’re right that the show definitelt mimics the books when it comes to her behavior towards him. If they plan to follow the books regarding the brothers then it’s no surprise how it will turn out.

I’ve looked at Stefan and Damon like this…Stefan on the surface seems to be the one with the most humanity because that’s who he wants to be. Damon on the surface seems like he doesn’t have much humanity because underneath he has so much that it’s caused him nothing but pain.