Am I in the wrong for feeling jealous?

My boyfriend has known his female friend for quite sometime. I did not mind their relationship until she was being very overly friendly with him. I know she likes him a lot based on how he talks about him and how he describes him.

I had mentioned this to him about her behaviour and he said he will just keep things neutral and he knew she liked him too.

Now he invited her to a game we both play because he wanted more numbers but I have a hunch she thinks this will get her closer to him and they can be a couple instead? Im trying to not get upset but I know to this day she still likes him and I know if we ever split up he would run to her.

Our relationship has been a bit rocky lately and I am worried he is looking for attention elsewhere. We have smoothed over a lot of things but I feel uneasy with her being around and especially he knows she likes him. He said "It is her problem if she likes me, I only want you".

Do I have a right?
Am I in the wrong for feeling jealous?
Post Opinion