You can't change the size of your living room without complicated and expensive renovations, but you can make it look more spacious.
Light, color, and interior can change your perception of a room a lot.
Here are some interior design tips that might help.
Optimize Furniture Placement
Arrange your furniture strategically to maximize open space. Avoid blocking natural pathways or placing furniture directly against the walls. Create a sense of openness by leaving some breathing room between pieces, and consider using furniture with exposed legs to create a more airy and visually light atmosphere.
Utilize Mirrors
Mirrors are excellent tools for creating an illusion of space. Place a large mirror on a focal wall to reflect light and give the impression of a larger room. You can also use mirrored furniture or decorative mirror panels to enhance the effect.
Use Strategic Lighting
Supplement natural light with artificial lighting to create an illusion of depth and space. Use a combination of overhead lighting, task lighting, and floor or table lamps to evenly illuminate the room and avoid dark corners.
Minimize Patterns
While patterns can add visual interest, in a small living room they can make the space feel busy and cramped. Opt for solid colors or subtle patterns that don't overpower the room.