Romantic relationships have a profound impact on our bodies. Simply being near our partners can affect our blood pressure, heart rate, breathing, and hormones. A study at Toronto University found that individuals with high blood pressure but a belief in a happy marriage experience lower blood pressure when their partners are around. Conversely, those in unhappy marriages experience even higher blood pressure when their partners are present. Our mental and physical well-being can be greatly influenced by how we perceive and experience our relationships.