Basically if you just keep your portion size down, you should be fine. At thai, don't heap your plate up. Or any of those restaurants where you might help yourself from several dishes. Because there's only two of you, maybe its better not to share the main meal and just order one for yourself and share rice.
If the portions come out large and it looks high cal, just avoid eating half of it. and drink lots of water. Order a side salad with separate dressing so you can put on only a little bit.
Don't ruin what you order by asking them to keep all the yummy things off. It could end up being very bland.