Interest on things

Let's say I found myself in a very difficult financial situation. I went into the red and didn't know how to get out of it without being dragged into loans and crazy interest rates from banks and the like. I met a friend and told him about the situation I was in, and suddenly he explained to me that he had money in an amount that could get me out of the mess. It's almost 100,000 NIS. On an interest-free loan for a long time that I could afford with dignity.
Am I not allowed to tell others about his kindness? Compliment him for lending me money? Jump in when he asks for help with something (I wasn't usually one of the first to jump in, I'm lazy). I want to thank him for the crazy help he gave me. It wasn't just help, he literally saved me from a difficult mental state and a lot of trouble.
Are all of these considered interest?