I don't see it at all. There's nothing hidden about his interest in you, he comes right out with it. And of course he's not happy about being rejected but so what? The few points you lost there you can make up later, if you care about such a thing.
The dialogue options have icons, you can't choose one and later say, "I didn't know what was going to happen".
sorry, what I wrote wasn't clear : For now I don't see any "hidden" LI comments (still playing the game, 1st playthrough, and I don't plan to have a LI with him anyways, then I will certainly miss some dialogues), the thing is Anders starts (like Isabella) to poke you just after your recruit him and it's a bit too much. He's very insistent. I'm ok to have some characters making the first step, it's a very good idea. But on DA2 for Anders or Isabella it's too fast, personal opinion... (for Isabella, it's a less shocking, she has a really "bad girl" side, but Anders... ) You don't know them, they don't know you. So, this situation reminds me of what happened with Sha'ira, it's so fast you don't really see where it's coming from. Hope it's clearer 