Café Parvis is expensive but worth it. It was really hard to find the place because it has the same interior and outlook as the fancy restaurant next door (same owner) and you can't tell if it's one restaurant or two. The interior and ambience is enchanting, especially during summer when the terrace is open and the vine leaves are about.
Their latté game is en pointe, one of the better ranking lattés I've had in Montreal and I've had quite a lot of lattés actually.
The servers are also friendly, they accidentally prepared two lattés and we ordered only one so offered us the other one for free.
I would advice staying away from the flatbread pizzas if you want to eat here on a budget. I had the salmon flatbread and it tasted good but I wish I could've shared it with someone (my friend already ordered salad). If you're going with your boyfriend, order a flatbread and share. And sit by the window.
Also don't forget to bring your instagram gear, great place for cute café pictures.