Friendship group

HI everyone,

I have been friends with an person A for about 20 years now, we used to go to the same secondary school together and have been friends through thick and thin. Now i was friends with these other two people (Person B & C) who also went to the same school but I was friends with them and not person A, It was me who got him to hang around with person B & C when we were that age. As it happens the relationship with B & C went sour over time and we drifted apart and thats fine, however what happnened is that person A bumped into person B recently at a shopping mall after all these years and they exchanged numbers and had since been in contact with BOTH B & C, I didnt know about it at the time however he told me recently that he has been in contact with both, I was a bit surprised but that is also fine as well.

Now he asked me if i was willing to meet them despite what happened between us and im like its ok, I wouldnt want to hang around them all the time but as a one off i wouldnt mind, get to see what they are doing these days, he contacted them for the 4 of us to meet, the other two said they are busy up until xmas and cant meet before then, he however then messaged them a few days after saying that why dont the 3 of us meet up, they both jumped at the chance and met up with him. I must admit I did feel hurt, they both dont want to meet up with me, but im equally surprised that Person A arranged for the 3 of them to meet up as if i was in the same boat I would never have done that as i am loyal to person A.

Since then I have met Person A and he is acting super weird, the least time we met he wouldnt give me much "goss" on the meet up they had and there were a number of silences between us, i just thought to myself what is going on, i know for certain that Person B & C love a good gossip so things must have been said about me, now i am angry and dont know what to do. I know for a fact if i had done this to Person A he would be FUMING, but he expects me to deal with it in a calm manner as if nothing has happened.

What would you guys do in that situation? Person A is so hard to talk to at times as he doesnt do "feelings", I on the other hand if something is bothering me i dont mind speaking up.