Is depression infectious?

I don’t know what the correct answer to that is but what I can tell you from experience is that I think it might be.

I was in a relationship with a really depressed guy. We had good times and bad times. I started feeling suffocated, I took care of his laundry, cleaning his room and making him food. He couldn’t Get out of bed some days. I started to feel weighed down, emotionally tired and just didn’t wanna do anything either. I felt like I lost my energy to live. My bubbly happy self was gone. I didn’t even recognize myself anymore.