Will I regret choosing to not have kids?

I F(30) am happily married to my husband M(31) since the last two years. Neither of us wanted kids, but we have often found ourselves asking if we will regret not having kids in the future. Somehow, this feeling only comes up when we are with his family ( we live in a joint family setup). His brother and sister-in-law in law had an adorable baby girl last year - and i often find myself wondering if I will regret choosing to not be a mother. We are both doing well at work and love the life we hace currently, but are scared that we might become the odd ones in our friend circles maybe 5 years down the line when all of them have kids. For people who chose to not have kids, do you regret it, and why?

Tl;dr: husband and I are very happy and feel we don’t really want kids, but are scared that we will regret this later. Need advice from other couples who have chosen the DINK (double income no kids) life