My girl cousin is always telling my boyfriend she loves and misses him. Am I insecure?

Me and my cousin are very close and whenever I'm with my boyfriend, wither its in person or on the phone, everything is normal and they call each other family etc. however whenever me and my cousin don't speak for a couple days and reconnect she will tell me to tell him she loves and misses him. I find this weird, and so does my boyfriend, however he tells me to say it back to her? Am I just being insecure?

My girl cousin is always telling my boyfriend she loves and misses him. Am I insecure?
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