Boyfriend has a crush on a celebrity. Is it weird to be jealous?

Anonymous
My boyfriend has a crush on Jenna Coleman from Doctor Who and in his bedroom, he's got posters of her on his wall. When I asked him about it, he just told me to relax and said "it's not like I fancy her in relationship terms". Maybe it's because I don't really have a crush on any celebrity atm but a part of me feels jealous even though he's with me and Jenna Coleman is just an unrealistic fantasy for him. Is it ok to be this jealous or am i just being unreasonable?
Boyfriend has a crush on a celebrity. Is it weird to be jealous?
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