The quality of a date doesn't really depend on material things. What matters is having fun together. In other words, don't go on hikes or to the library because it costs less. Instead, go on hikes or to the library because it's something you want to do together. You can introduce each other to interests that you had when you were younger, or try new things together. If you two love food, instead of eating at nice restaurants, you could cook together, and even try some challenging recipes. If you love traveling but can't afford big trips, do travel research and planning together, or go for a small trip within driving distance. You can also look into free or low-cost activities in your community, like concerts in the park, community theaters, zoos, museums, or even shows put on by the local high schools.