One of the restaurants in Raffles would be special (but not the long bar--too many rowdy foreign tourists). There's a formal dining room (with its own small piano bar) behind the front desk in the main building, but I actually like to sit in the courtyard at the somewhat casual fish restaurant with the outdoor kitchen which used to have quite good live music. You look at the building and do a bit of people watching as day turns into evening and then night. The tables are fairly well spaced too.

I like Jaan too, including its view. [BTW, there's a reasonably priced menu at lunchtime, at least during the business week.]

Would you like to do the Ferris wheel? I think dinner there would be too expensive (and I wouldn't be particularly confident about the quality of the food) but you can also arrange for a champagne ride.

Depending on what you mean by a view, there are restaurants along the river (at the far end, for example around the artsy boutique hotel, not the places near Clarke Quay that seem to be mobbed by drunks) and on Sentosa that would have water views. Along the river, there's a French bistro place and further down, but on the same side of the river, a northern Italian place, both with lots of outdoor seating. The Millenium Hotel across the river also has a restaurant, but the place seems to get conference groups. The restaurant and bar in the Westin used to have views, but I think a new building now blocks a lot. I've never eaten there, but there's a restaurant in a distinctive spot near the Fullerton Hotel that seems to overlook the Merlin; you might also be able to see the new helix bridge. The Fullerton Hotel itself has an outdoor porch restaurant and bar looking toward the Asian Civilizations museum. I think the top of the Fullerton Bay Hotel has only an outdoor deck and bar, with no restaurant.

A local once took me to a very pretty place for lunch inside the orchid garden. It was leafy green with lots of dark wood and seemed to be surrounded by jungle vegetation. I'm not sure whether it would be open for dinner.

Much of Singapore's food scene revolves around hawker centers and extremely informal (tightly packed big round tables with plastic tablecloths and mismatched plastic chairs) seafood places (for example, along the coast in the general direction of the airport). There are also some big buffets (including in at least one restaurant in Raffles), which I also think wouldn't be suitable for a proposal.