Name change for obvious reasons.
Bit of background - happily married with young kids, been with DH for nearly 2 decades and still very much in love.
So the problem I need help with is as follows - two of our mutual friends were in a relationship which has broken down, we have both stayed friends with both however I have become much closer with our mutual male friend. We have loads in common (interests and hobbies etc) and are in contact very regularly albeit never face to face interaction unless DH is around too. There has never been a physical attraction and I've never looked at him twice however over the last few weeks I've started to feel an emotional connection developing (not sure if it's mutual). I'm confused as I don't have any physical attraction to our mutual friend but we have clicked and get on really well and I've found myself looking forward to chatting with him and to our group meet ups to catch up. DH has started to pick up on the amount of communication between us (all platonic conversations, never has a line been crossed) and I feel has become a bit worried of the friendship. I don't want to lose a good friend as I really do value his friendship and I have no physical attraction to him and would never ever cheat on DH, he is my entire world.
Really what I'm asking is how do I manage this friendship going forward and is it normal to feel a strong emotional connection to someone else? I already only meet with him in a group setting with DH, I don't flirt with him, neither of us have been disrespectful in our conversations etc.