Is my boyfriend too jealous and overbearing?

Recently my long distance boyfriend has been getting more and more jealous. I have not cheated on him or have created any doubt for him to think I would be unfaithful. I recently was invited into whatsapp group containing people of all over the world that included both males and females. I made a comment to him that some of the boys were thirsty and he immediately started getting worried. I reassured him time and time again that he was the only one on my mind, however he would not listen. After much discussion he seemed okay with it until he asked to be in the group. When I asked him why he said its to check on me and how I act around the guys.
I'm not sure how to react to this and I'm confused since some call it cute and others cringe at my story. Please help! 

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