My apologies for being blunt in my reply, I'm afraid I have a headache and am not functioning properly but needed to ask ...
You have built up friendships with people on here through shared experiences, and you genuinely care for them as friends (older friends and new friends who join us here). You want to stay in touch and support others who join.
I can see how New Guy may feel like he is competing with Kenneth but the fact is - Kenneth is not here, he is - and there is no competition to fight.
To be honest, I view anybody who tells you who you are allowed as friends to be controlling and potentially emotionally manipulative. If you made widow friends in real-life rather than online, would he be trying to stop you going for coffee with them? Does he really understand how manipulative and controlling he is being, by deciding who you are allowed to be friends with?
Just my opinion, of course, and it's entirely possible he would be horrified to think that's how he was behaving. I just have a severe dislike of emotional manipulation. Others are always welcome to disagree with me and I look forward to the other replies.